i want to use a R-28 Sarmat Nuclear MIRV capable ICBM (in Minecraft)

package com.example.demo;
// gigachad converters
import java.io.*;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.*;
import java.util.Random;
import java.util.Arrays;
import java.util.Collections;
import org.apache.poi.xwpf.usermodel.*;

import static java.nio.file.StandardCopyOption.REPLACE_EXISTING;

public class Operational_Functional_Block {
    public static void main(String[] args) throws IOException {
        File pathn1 = new File("C:/Users/Public/Operational_Functional_Block/src/obf_rex.docx");
        if (!(new File(String.valueOf(pathn1)).exists())){
            XWPFDocument docx1 = new XWPFDocument();
            XWPFParagraph par1 = docx1.createParagraph();
            par1.setAlignment(ParagraphAlignment.CENTER);
            XWPFRun run1 = par1.createRun();
            run1.setText("Rocket Engine Generator");
            run1.setFontFamily("Calibri");
            run1.setBold(true);
            run1.setFontSize(33);
            run1.setTextPosition(60);
            // -----------------------------------------------------------------------------
            XWPFParagraph par2 = docx1.createParagraph();
            par2.setAlignment(ParagraphAlignment.RIGHT);
            XWPFRun run2 = par2.createRun();
            LocalDateTime date = LocalDateTime.now();
            DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd MMM yyyy, HH:mm:ss");
            String dt = date.format(formatter);
            run2.setText("Created on: " + dt);
            run2.setFontFamily("Calibri");
            run2.setBold(true);
            run2.setFontSize(10);
            run2.setTextPosition(60);
            // ----------------------------------------------------------------------------------------------------
            FileOutputStream out1 = new FileOutputStream(String.valueOf(pathn1));
            docx1.write(out1);
            out1.close();
            docx1.close();
        }
        int i = 0;
        System.out.println("Welcome to the rocket engine generator!" + '\n');
        Scanner scanner = new Scanner(System.in);
        String repeatCommand = "Y";
        while (!repeatCommand.equals("N")) {
            System.out.println("Do you want to generate a new engine? [Y/N]");
            System.out.print("> ");
            //repeatCommand = scanner.next();
            //repeatCommand = repeatCommand.toUpperCase();
            if (repeatCommand.equals("N")) {
                System.exit(0);
            } else if (repeatCommand.equals("Y")) {
                Path path = Paths.get(String.valueOf(pathn1));
                double sizeInbytes = Files.size(path);
                double sizeInKilobytes = (sizeInbytes/1000);
                if (sizeInKilobytes < 10) {
                    System.out.println("size" + "------>" + Files.size(path));
                } else {
                    File logM = new File("C:/Users/Public/Operational_Functional_Block/src/FullFolders");
                    logM.mkdir();
                    // ------------------------------
                    File pathn2 = new File("C:/Users/Public/Operational_Functional_Block/src/obf_reg.docx");
                    //File pathn3 = new File("C:/Users/Public/Operational_Functional_Block/src/obf_reg[Full].docx");
                    //pathn2.renameTo(pathn3);
                    // ------------------------------
                    Path normPF = Path.of(String.valueOf(pathn2));
                    if ((new File("C:/Users/Public/Operational_Functional_Block/src/FullFolders/obf.reg[Full].docx")).exists()) {
                        Path logPF = Paths.get("C:/Users/Public/Operational_Functional_Block/src/FullFolders/obf.reg[Full]" + i + ".docx");
                        Files.copy(normPF, logPF, REPLACE_EXISTING);
                    } else {
                        Path logPF = Paths.get("C:/Users/Public/Operational_Functional_Block/src/FullFolders/obf.reg[Full].docx");
                        Files.copy(normPF, logPF, REPLACE_EXISTING);
                    }
                    XWPFDocument docx1 = new XWPFDocument();
                    XWPFParagraph par1 = docx1.createParagraph();
                    par1.setAlignment(ParagraphAlignment.CENTER);
                    XWPFRun run1 = par1.createRun();
                    run1.setText("Rocket Engine Generator");
                    run1.setFontFamily("Calibri");
                    run1.setBold(true);
                    run1.setFontSize(33);
                    run1.setTextPosition(60);
                    // -----------------------------------------------------------------------------
                    XWPFParagraph par2 = docx1.createParagraph();
                    par2.setAlignment(ParagraphAlignment.RIGHT);
                    XWPFRun run2 = par2.createRun();
                    LocalDateTime date = LocalDateTime.now();
                    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd MMM yyyy, HH:mm:ss");
                    String dt = date.format(formatter);
                    run2.setText("Created on: " + dt);
                    run2.setFontFamily("Calibri");
                    run2.setBold(true);
                    run2.setFontSize(10);
                    run2.setTextPosition(60);
                    // ----------------------------------------------------------------------------------------------------
                    FileOutputStream out1 = new FileOutputStream(String.valueOf(pathn1));
                    docx1.write(out1);
                    out1.close();
                    docx1.close();
                }
                // Arrays
                String lbrk = "////////////////////////////////////////////////////////////////";
                String[] engine_Name1 = {"\"Argosy\"", "\"Galileo\"", "\"Callisto\"", "\"Nauka\"",
                        "\"Rassvet\"", "\"Zvezda\"", "\"Zarya\"", "\"Orion\"", "\"Ares\"", "\"Delta\"", "\"Atlas\"",
                        "\"Daedalus\"", "\"Baltia\"", "\"Dizhou\"", "\"Hermes\"", "\"Icarus\"", "\"Connestoga\"", "\"Yupiter\"",
                        "\"Emphasis\"", "\"Olympus\"", "\"Kronos\"", "\"Helios\"", "\"Alabaster\"", "\"Falcon\"",
                        "\"Eagle\"", "\"Endeavour\"", "\"Atlantis\"", "\"Cygnus\"", "\"Apollo\"", "\"Horizon\"",
                        "\"Pioneer\"", "\"Voyager\"", "\"Exploration\"", "\"Expedition\"", "\"Vulcan\"",
                        "\"Federation\"", "\"Sojourner\"", "\"Nautilus\"", "\"Jubilance\"", "\"Lagrange\"",
                        "\"Prometheus\"", "\"Tellus\"", "\"Alpha\"", "\"Delta\"", "\"Proton\"", "\"Neutron\"",
                        "\"Electron\"", "\"Pluton\"", "\"Poodle\"", "\"Skipper\"", "\"Convair\"", "\"Nexus\"",
                        "\"Vector\"", "\"Terrier\"", "\"Rhino\"", "\"Panther\"", "\"Goliath\"", "\"Juno\"", "\"Shrimp\"",
                        "\"Thumper\"", "\"Mainsail\"", "\"Dart\"", "\"Twitch\"", "\"Stratus\"", "\"Oscar\"",
                        "\"Sentinel\"", "\"Pegasus\"", "\"Kelus\"", "\"Starshot\"", "\"Vernor\"", "\"Mammoth\"",
                        "\"Douglas\"", "\"Heimdall\"", "\"Dynetics\"", "\"Pathfinder\"", "\"Horizon\"", "\"Poisk\"",
                        "\"Pirs\"", "\"Philae\"", "\"Mariner\"", "\"Centaur\"", "\"Orel\"", "\"Pratt\"", "\"Hyperion\"",
                        "\"Sagittarius\"", "\"Apollo\"", "\"Bryton\"", "\"Volga\"", "\"Harmony\"", "\"Cassini\"", "\"Contour\"",
                        "\"Altair\"", "\"Dream\"", "\"Baikal\"", "\"Zenith\"", "\"Urpinod\"", "\"Bernal\"", "\"Condor\"",
                        "\"Athena\"", "\"Astra\"", "\"Aerolus\"", "\"Rombus\"", "\"Lunokhod\"", "\"Fregat\"", "\"Glonass\"",
                        "\"Dragon\"", "\"Salyut\"", "\"Starliner\"", "\"Skylab\"", "\"Briz\"", "\"Colombus\"", "\"Rosetta\"",
                        "\"Redstone\"", "\"Antares\"", "\"Philae\"", "\"Prospero\"", "\"Leonardo\"", "\"Parker\"", "\"Dyson\"",
                        "\"Oberon\"", "\"DragonFly\"", "\"Energia\"", "\"Buran\"", "\"Urgan\"", "\"Angara\"", "\"Vostok\"",
                        "\"Voskhod\"", "\"Shenzhou\"", "\"Ingenuity\"", "\"Oberon\"", "\"Discovery\"", "\"Horizon\"",
                        "\"Cerasus\"", "\"Progress\"", "\"Unity\"", "\"Surveyor\"", "\"Prospector\"", "\"Ikar\"", "\"Redstone\"",
                        "\"Lapis\"", "\"Caesius\"", "\"Iridium\"", "\"Daedlus\"", "\"Aelita\"", "\"Beta\"", "\"Gamma\"",
                        "\"Alpha\"", "\"Epsilon\"", "\"Omega\"", "\"Discoverer\"", "\"Explorer\"", "\"Hornet\"", "\"Serenity\"",
                        "\"Ariane\"", "\"Hornet\"", "\"Asimov\"", "\"Pegasus\"", "\"Venture\"", "\"Antares\"", "\"Star\"",
                        "\"Archimedes\"", "\"Hera\"", "\"Iris\"", "\"Titan\"", "\"Artemis\"", "\"Phoenix\"", "\"Ross\"",
                        "\"Sarychev\"", "\"Nemesis\"", "\"Heimdall\"", "\"Sturt\"", "\"Odin\"", "\"Aethelred\"", "\"Vesper\"",
                        "\"Aces\"", "\"Argon\"", "\"Olympia\"", "\"Perseus\"", "\"Chyron\"", "\"Proxima\"", "\"Arminus\"",
                        "\"Destiny\"", "\"Valient\"", "\"FireFly\"", "\"Obsidian\"", "\"Leviathan\"", "\"Magellan\"", "\"Voyager\"",
                        "\"Mariner\"", "\"Joist\"", "\"Crimson\"", "\"Fortune\"", "\"Vanguard\"", "\"Aurora\"", "\"Ulysses\"",
                        "\"Crusader\"", "\"Python\"", "\"Kuiper\"", "\"Insurgent\"", "\"Pathfinder\"", "\"Kvant\"", "\"Spektr\"",
                        "\"Cassini\"", "\"Zemlya\"", "\"Dawn\"", "\"Kepler\"", "\"Parom\"", "\"Elektron\"", "\"Aeonian\"",
                        "\"Node\"", "\"Burya\"", "\"Voyager\"", "\"Ceres\"", "\"Bayern\"", "\"Chasovoy\"", "\"Copernicus\"",
                        "\"Quaoar\"", "\"Minotaur\"", "\"Agena\"", "\"Thor\"", "\"Vega\"", "\"Scout\"", "\"Coeus\"", "\"Minerva\"",
                        "\"Kratos\"", "\"Neith\"", "\"Omoikane\"", "\"Gayamun\"", "\"Odin\"", "\"Kronos\"", "\"Hope\"", "\"Polet\"",
                        "\"Polyot\"", "\"Sputnik\"", "\"Clementine\"", "\"Sojourner\"", "\"Ingenuity\"", "\"Perseverence\"", "\"Insider\"",
                        "\"Onatchesko\"", "\"Atlantis\"", "\"Tsyklon\"", "\"Zenit\"", "\"Almaz\"", "\"Soyuz\"", "\"Molniya\"", "\"Kosmos\"",
                        "\"Oreol\"", "\"Yantar\"", "\"Foton\"", "\"Meteor\"", "\"Ekran\"", "\"Strela\"", "\"Bion\"", "\"Piroda\"",
                        "\"Salyut\"", "\"Strela\"", "\"Luch\"", "\"Potok\"", "\"Prognoz\"", "\"Orlets\"", "\"Etalon\"", "\"Astron\"",
                        "\"Efir\"", "\"Kometa\"", "\"Fram\"", "\"Zemlya\"", "\"Gorizont\"", "\"Arkon\"", "\"Gamma\"", "\"Ekspress\"",
                        "\"Gonets\"", "\"Taifun\"", "\"Okean\"", "\"Reflektor\"", "\"Kolibr\"", "\"Sever\"", "\"Comet\"",
                        "\"Roton\"", "\"Solaris\"", "\"Altaris\"", "\"Ithacus\"", "\"Dekto\"", "\"Dream\"", "\"Impuls\"",
                        "\"Vremya\"", "\"Portal\"", "\"Zodiak\"", "\"Slava\"", "\"Inertsiya\"", "\"Stimuls\"", "\"Ambross\"",
                        "\"Amal\"", "\"Thea\"", "\"Orphelia\"", "\"Polyot\"", "\"Mudrost\"", "\"Carrack\"", "\"Artak\"",
                        "\"Questar\"", "\"Artyom\"", "\"Tsyclon\"", "\"Ascension\"", "\"Tenacity\"", "\"Contour\"", "\"Zephyr\"",
                        "\"Atlanta\"", "\"Polaris\"", "\"Aeolus\"", "\"Mayak\"", "\"Pamir\"", "\"Taimyr\"", "\"Cheget\"", "\"Sirius\"",
                        "\"Uragan\"", "\"Agat\"", "\"Skiph\"", "\"Kristall\"", "\"Altair\"", "\"Uran\"", "\"Ingul\"", "\"Carat\"",
                        "\"Pulsar\"", "\"Titan\"", "\"Eridanus\"", "\"Parus\"", "\"Cepheus\"", "\"Varagian\"", "\"Olympus\"",
                        "\"Tarkhaniy\"", "\"Astraeus\"", "\"Antares\"", "\"Kazbek\"", "\"Burlak\"", "\"Borei\"", "\"Favor\"",
                        "\"Rubin\"", "\"Almaz\"", "\"Granit\"", "\"Ruby\"", "\"Sokol\"", "\"Argon\"", "\"Kavkaz\"", "\"Ural\"",
                        "\"Berkut\"", "\"Dunay\"", "\"Yastreb\"", "\"Terek\"", "\"Radon\"", "\"Taymyr\"", "\"Pamir\"", "\"Photon\"",
                        "\"Elbrus\"", "\"Isayiev\"", "\"Shmel\"", "\"Kobra\"", "\"Shturn\"", "\"Metis\"", "\"Malyutka\"", "\"Fleyta\"",
                        "\"Konkurs\"", "\"Bastion\"", "\"Svir\"", "\"Ataka\"", "\"Vodopad\"", "\"Veter\"", "\"Vyuga\"", "\"Vulga\"",
                        "\"Tochka\"", "\"Oka\"", "\"Dvina\"", "\"Almaz\"", "\"Araks\"", "\"Kanopus\"", "\"Kliper\"", "\"Kobalt\"",
                        "\"Siluet\"", "\"Kondor\"", "\"Lotos\"", "\"Luch\"", "\"Mir\"", "\"Neman\"", "\"Obzor\"", "\"Okean\"", "\"Oko\"",
                        "\"Oktan\"", "\"Orlets\"", "\"Poisk\"", "\"Potok\"", "\"Pirs\"", "\"Prognoz\"", "\"Resurs\"", "\"Rodnik\"",
                        "\"Romb\"", "\"Kapustin\"", "\"Oplot\"", "\"Tsygan\"", "\"Teplokhod\"", "\"Sokosha\"", "\"Rubezh\"", "\"Topol\"",
                        "\"Zircon\"", "\"Moskva\"", "\"Tryol\"", "\"Ustinov\"", "\"Belyayev\"", "\"Novorod\"", "\"Argos\"", "\"Dreadnought\"",
                        "\"Nerthus\"", "\"Janus\"", "\"Hephaestus\"", "\"Themis\"", "\"Chronos\"", "\"Tethys\"", "\"Minos\"", "\"Visionalis\"",
                        "\"Autumn\"", "\"Resilience\"", "\"Aelita\"", "\"Rheus\"", "\"Solntspek\"", "\"Spitzer\"", "\"Cartago\"", "\"Liberty\"",
                        "\"Melibea\"", "\"Spartacus\"", "\"Pulsar\"", "\"Fusion\"", "\"Reliant\"", "\"Thunder\"", "\"Novo\"", "\"Granis\"",
                        "\"Panthera\"", "\"Nematoda\"", "\"Anelida\"", "\"Chordata\"", "\"Tetrapoda\"", "\"Cyclero\"", "\"Carrier\"", "\"Saturn\"",
                        "\"Gaia\"", "\"Irtysh\"", "\"Wyvern\"", "\"Tarsier\"", "\"Alpina\"", "\"Espadon\"", "\"Parlos\"", "\"Nebula\"",
                        "\"Lazarus\"", "\"Rufus\"", "\"Dornier\"", "\"Argus\"", "\"Kybau\"", "\"Kalau\"", "\"Chasvoy\"", "\"Zephyr\"",
                        "\"Temny\"", "\"Gorizont\"", "\"Yars\"", "\"Krugazor\"", "\"Soprotivlenye\"", "\"Shtil\"", "\"Layner\"", "\"Bulava\"",
                        "\"Vysota\"", "\"Volna\""};
                String[] engine_Cycle = {"Gas Generator", "Staged Combustion (oxidizer Rich)", "Staged Combustion (Fuel Rich)",
                                         "Expander (Open)", "Expander (Closed)", "Dual Expander (Open)", "Dual Expander (Closed)",
                                         "Pressure-Fed", "Full Flow Staged", "Electric Pump Fed", "Combustion Tap Off",
                                         "Monopropellant (Cold Gas)", "Monopropellant (Decomposition)", "Gas Core", "Liquid Core",
                                         "Solid Core", "Pulsed Nuclear", "Pebble-Bed", "Nuclear SaltWater"};
                String[] propellant_List1 = {"H2O2 (Hydrogen Peroxide)", "N2H4 (Hydrazine)", "NH2OH+NO3 (Hydroxyl ammonium nitrate)"};
                String[] propellant_List2 = {"Nitrogen (N2)", "Helium (He)", "Carbon Dioxide (CO2)", "Ammonia (NH3)", "Hydrogen (H2)",
                                             "Methane (CH4)"};
                String[] propellant_List3 = {"Hydrogen (H2)", "Helium (He)", "Nitrogen (N2)", "Hydrogen (H)", "Ammonia (NH3)",
                                             "Water (H2O)", "Oxygen (O2)", "Carbon Dioxide (CO2)", "Carbon Monoxide (CO)",
                                             "Methane (CH4)"};
                String[] altitude_Of_Operation = {"0-10 km (Sea Level)", "20-30 km (Medium Atmosphere)",
                                                  "30-80 km (High Atmosphere)", "80 km+ (Vacuum)", "Any Altitude (0-80 km+)"};
                String[] tank_Repressurisation = {"Autogenously", "using Inert gas"};
                String[] nozzle_Type_List1 = {"De Laval Cone (Without Nozzle Extension)",
                                              "De Laval Bell (Without Nozzle Extension)"};
                String[] firstPart = {"RD", "RS", "AJ", "XLR", "NK", "RL", "KDTU", "AR", "BE", "MV",
                                      "YF", "PKA", "TQ", "MJ", "XS", "LM10", "HM", "LE", "LRE", "CE", "DST",
                                      "DOK", "KDU", "KRD", "R", "RO"};

                // Randomise Arrays
                boolean Flagger;
                String engine_Name = "";
                if (new File("C:/Users/sfsga/IdeaProjects/demo/obf_reg.docx").exists()) {
                    Flagger = true;
                    while (Flagger) {
                        Collections.shuffle(Arrays.asList(engine_Name1));
                        Collections.shuffle(Arrays.asList(firstPart));
                        Random engineNameChosen = new Random();
                        Random firstPartC = new Random();
                        int engineNameChosen_index = engineNameChosen.nextInt(engine_Name1.length);
                        int firstPart_index = firstPartC.nextInt(firstPart.length);
                        String engNameFinalf = " " + engine_Name1[engineNameChosen_index];
                        String firstPart_f = firstPart[firstPart_index] + "-";
                        // Find number
                        int finalNumber = 10 + ((int) (Math.random() * 1001));
                        // is it eligible for letter at end = NO!
                        if (finalNumber % 8 == 0) {
                            engine_Name = firstPart_f + finalNumber + engNameFinalf;
                        } else {
                            char randomizedCharacter;
                            int uio93 = 1 + ((int) (Math.random() * 1001));
                            int uio94 = 1 + ((int) (Math.random() * 11));
                            Random randomLetter = new Random();
                            if (uio93 % uio94 == 0) {
                                randomizedCharacter = (char) (randomLetter.nextInt(26) + 'a');
                                while (randomizedCharacter == 'o' || randomizedCharacter == 'i'|| randomizedCharacter == 'q'|| randomizedCharacter == 'e'|| randomizedCharacter == 'h'|| randomizedCharacter == 'g'|| randomizedCharacter == 'c'|| randomizedCharacter == 'j') {
                                    randomizedCharacter = (char) (randomLetter.nextInt(26) + 'a');
                                    if (randomizedCharacter == 'o' || randomizedCharacter == 'i'|| randomizedCharacter == 'q'|| randomizedCharacter == 'e'|| randomizedCharacter == 'h'|| randomizedCharacter == 'g'|| randomizedCharacter == 'c'|| randomizedCharacter == 'j') {
                                        break;
                                    }
                                }
                            }
                            else {
                                randomizedCharacter = (char) (randomLetter.nextInt(26) + 'A');
                                while (randomizedCharacter == 'O' || randomizedCharacter == 'I'|| randomizedCharacter == 'Q') {
                                    randomizedCharacter = (char) (randomLetter.nextInt(26) + 'A');
                                    if (randomizedCharacter == 'O' || randomizedCharacter == 'I'|| randomizedCharacter == 'Q') {
                                        break;
                                    }
                                }
                            }
                            engine_Name = firstPart_f + finalNumber + randomizedCharacter + engNameFinalf;
                        }
                        try {
                            File fila = new File("C:/Users/sfsga/IdeaProjects/demo/obf_reg.docx");
                            Scanner reader = new Scanner(fila);
                            while (reader.hasNextLine()) {
                                String data = reader.nextLine();
                                Flagger = data.equals(engine_Name);
                            }
                            reader.close();

                        } catch (FileNotFoundException e) {
                            e.printStackTrace();
                        }
                    }

                } else {
                    Collections.shuffle(Arrays.asList(engine_Name1));
                    Collections.shuffle(Arrays.asList(firstPart));
                    Random engineNameChosen = new Random();
                    Random firstPartC = new Random();
                    int engineNameChosen_index = engineNameChosen.nextInt(engine_Name1.length);
                    int firstPart_index = firstPartC.nextInt(firstPart.length);
                    String engNameFinalf = " " + engine_Name1[engineNameChosen_index];
                    String firstPart_f = firstPart[firstPart_index] + "-";
                    int finalNumber = 12 + ((int) (Math.random() * 1001));
                    if (finalNumber % 8 == 0) {
                        engine_Name = firstPart_f + finalNumber + engNameFinalf;
                    }
                    else {
                    char randomizedCharacter;
                    int uio93 = 1 + ((int) (Math.random() * 1001));
                    int uio94 = 1 + ((int) (Math.random() * 11));
                    Random randomLetter = new Random();
                    if (uio93 % uio94 == 0) {
                        randomizedCharacter = (char) (randomLetter.nextInt(26) + 'a');
                        while (randomizedCharacter == 'o' || randomizedCharacter == 'i'|| randomizedCharacter == 'q'|| randomizedCharacter == 'e'|| randomizedCharacter == 'h'|| randomizedCharacter == 'g'|| randomizedCharacter == 'c'|| randomizedCharacter == 'j') {
                            randomizedCharacter = (char) (randomLetter.nextInt(26) + 'a');
                            if (randomizedCharacter == 'o' || randomizedCharacter == 'i'|| randomizedCharacter == 'q'|| randomizedCharacter == 'e'|| randomizedCharacter == 'h'|| randomizedCharacter == 'g'|| randomizedCharacter == 'c'|| randomizedCharacter == 'j') {
                                break;
                            }
                        }
                    }
                    else {
                        randomizedCharacter = (char) (randomLetter.nextInt(26) + 'A');
                        while (randomizedCharacter == 'O' || randomizedCharacter == 'I'|| randomizedCharacter == 'Q') {
                            randomizedCharacter = (char) (randomLetter.nextInt(26) + 'A');
                            if (randomizedCharacter == 'O' || randomizedCharacter == 'I'|| randomizedCharacter == 'Q') {
                                break;
                            }
                        }
                    }
                    engine_Name = firstPart_f + finalNumber + randomizedCharacter + engNameFinalf;
                }
                }
                Collections.shuffle(Arrays.asList(engine_Cycle));
                Random engineCycleChosen = new Random();
                int engineTypeChosen_index = engineCycleChosen.nextInt(engine_Cycle.length);
                String engine_Cycle_Chosen = engine_Cycle[engineTypeChosen_index];

                switch (engine_Cycle_Chosen) {
                    case "Gas Core", "Liquid Core", "Solid Core", "Pulsed Nuclear", "Nuclear SaltWater", "Pebble-Bed Core" -> {
                        String propellant_List_Chosen;
                        String nuclear_Cycle_Chosen;
                        String reactor_Fuel_Chosen;
                        String nozzle_Type_List_Chosen;
                        switch (engine_Cycle_Chosen) {
                            case "Gas Core" -> {
                                String[] remass_List = {"Hydrogen (H2)", "Nitrogen (N2)", "Monoatomic Hydrogen (H)", "Ammonia (NH3)",
                                        "Water (H2O)", "Oxygen (O2)", "Carbon Dioxide (CO2)", "Carbon Monoxide (CO)",
                                        "Methane (CH4)"};
                                Collections.shuffle(Arrays.asList(remass_List));
                                Random remassChosen = new Random();
                                int remassChosen_index = remassChosen.nextInt(remass_List.length);
                                String remass_List_Chosen = remass_List[remassChosen_index];
                                propellant_List_Chosen = "Uranium HexaFluoride Salt (UF6) and " + remass_List_Chosen + " as remass";
                                // Nuclear Cycle (Nuclear Thermal)
                                String[] nuclear_cycle1 = {"\"Expander Bleed\"", "\"Expander Closed\"", "\"Nuclear Lightbulb\"", "\"Vortex Confined\"",
                                        "\"Wheel Flow\"", "\"Magnetohydrodynamic(MHD) vortex\"", "\"Expander Open\""};
                                Collections.shuffle(Arrays.asList(nuclear_cycle1));
                                Random nuclearCycleChosen = new Random();
                                int nuclearCycleChosen_index = nuclearCycleChosen.nextInt(nuclear_cycle1.length);
                                nuclear_Cycle_Chosen = nuclear_cycle1[nuclearCycleChosen_index];
                                // Reactor Fuel (Nuclear Thermal)
                                String[] reactor_fuel = {"100-90% Uranium-235", "50% Uranium-235", "25-8% Uranium-235", "1-2% Uranium-235"};
                                Collections.shuffle(Arrays.asList(reactor_fuel));
                                Random reactorfuelChosen = new Random();
                                int reactorfuelChosen_index = reactorfuelChosen.nextInt(reactor_fuel.length);
                                reactor_Fuel_Chosen = reactor_fuel[reactorfuelChosen_index];
                                // Nozzle Type (Nuclear Thermal)
                                nozzle_Type_List_Chosen = "De Laval Bell (With Nozzle Extension)";
                            }
                            case "Liquid Core", "Colloid-Core", "Pebble-Bed Core" -> {
                                // Remass (Nuclear Thermal)
                                String[] remass_List2 = {"Hydrogen (H2)", "Nitrogen (N2)", "Monoatomic Hydrogen (H)", "Ammonia (NH3)",
                                        "Water (H2O)", "Oxygen (O2)", "Carbon Dioxide (CO2)", "Carbon Monoxide (CO)",
                                        "Methane (CH4)", "Hydrogen (H2) + Hexane (C6H14)"};
                                Collections.shuffle(Arrays.asList(remass_List2));
                                Random remassChosen = new Random();
                                int remassChosen_index = remassChosen.nextInt(remass_List2.length);
                                String remass_List_Chosen = remass_List2[remassChosen_index];
                                propellant_List_Chosen = "Uranium HexaFluoride Salt (UF6) and " + remass_List_Chosen + " as a remass";
                                // Nuclear Cycle (Nuclear Thermal)
                                String[] nuclear_cycle1 = {"\"Expander Bleed\"", "\"Expander Closed\"", "\"Vortex Confined\"", "\"Expander Open\""};
                                Collections.shuffle(Arrays.asList(nuclear_cycle1));
                                Random nuclearCycleChosen = new Random();
                                int nuclearCycleChosen_index = nuclearCycleChosen.nextInt(nuclear_cycle1.length);
                                nuclear_Cycle_Chosen = nuclear_cycle1[nuclearCycleChosen_index];
                                // Reactor Fuel (Nuclear Thermal)
                                String[] reactor_fuel = {"100-90% Uranium-235", "50% Uranium-235", "25-8% Uranium-235", "1-2% Uranium-235"};
                                Collections.shuffle(Arrays.asList(reactor_fuel));
                                Random reactorfuelChosen = new Random();
                                int reactorfuelChosen_index = reactorfuelChosen.nextInt(reactor_fuel.length);
                                reactor_Fuel_Chosen = reactor_fuel[reactorfuelChosen_index];
                                // Nozzle Type (Nuclear Thermal)
                                nozzle_Type_List_Chosen = "De Laval Bell (With Nozzle Extension)";
                            }
                            case "Nuclear SaltWater" -> {
                                propellant_List_Chosen = "Uranium TetraBromide (UBr4) + Water (H2O)";
                                nuclear_Cycle_Chosen = "";
                                // Reactor Fuel (Nuclear Thermal)
                                String[] reactor_fuel = {"100-90% Uranium-235", "50% Uranium-235", "25-8% Uranium-235", "1-2% Uranium-235"};
                                Collections.shuffle(Arrays.asList(reactor_fuel));
                                Random reactorfuelChosen = new Random();
                                int reactorfuelChosen_index = reactorfuelChosen.nextInt(reactor_fuel.length);
                                reactor_Fuel_Chosen = reactor_fuel[reactorfuelChosen_index];
                                // Nozzle Type (Nuclear Thermal)
                                nozzle_Type_List_Chosen = "De Laval Bell (With Nozzle Extension)";
                            }
                            default -> {
                                // Propellant (Nuclear Thermal)
                                Collections.shuffle(Arrays.asList(propellant_List3));
                                Random propellantChosen = new Random();
                                int propellantChosen_index = propellantChosen.nextInt(propellant_List3.length);
                                propellant_List_Chosen = propellant_List3[propellantChosen_index];
                                // Nuclear Cycle (Nuclear Thermal)
                                String[] nuclear_cycle1 = {"\"Expander Bleed\"", "\"Expander Closed\"", "\"Expander Open\""};
                                Collections.shuffle(Arrays.asList(nuclear_cycle1));
                                Random nuclearCycleChosen = new Random();
                                int nuclearCycleChosen_index = nuclearCycleChosen.nextInt(nuclear_cycle1.length);
                                nuclear_Cycle_Chosen = nuclear_cycle1[nuclearCycleChosen_index];
                                // Reactor Fuel (Nuclear Thermal)
                                String[] reactor_fuel = {"100-90% Uranium-235", "50% Uranium-235", "20-8% Uranium-235", "1-2% Uranium-235",
                                                         "100-90% Plutonium-238", "50% Plutonium-238", "25-8% Plutonium-238", "1-2% Plutonium-238"};
                                Collections.shuffle(Arrays.asList(reactor_fuel));
                                Random reactorfuelChosen = new Random();
                                int reactorfuelChosen_index = reactorfuelChosen.nextInt(reactor_fuel.length);
                                reactor_Fuel_Chosen = reactor_fuel[reactorfuelChosen_index];
                                // Nozzle Type (Nuclear Thermal)
                                nozzle_Type_List_Chosen = "De Laval Bell (With Nozzle Extension)";
                            }
                        }
                        // Altitude of Operation (Nuclear Thermal)
                        String altitude_Of_Operation_Chosen = "80 km+ (Vacuum)";
                        // Tank Repressurisation (Nuclear Thermal)
                        Collections.shuffle(Arrays.asList(tank_Repressurisation));
                        Random tankRepressurisationChosen = new Random();
                        int tankRepressurisationChosen_index = tankRepressurisationChosen.nextInt(tank_Repressurisation.length);
                        String tank_Repressurisation_Chosen = tank_Repressurisation[tankRepressurisationChosen_index];
                        // Beautiful Part (Nuclear Thermal)
                        System.out.println(lbrk + "\n" + "Your Engine is called: " + engine_Name + "\n");
                        System.out.println("Your Engine Cycle is: " + nuclear_Cycle_Chosen + " " + engine_Cycle_Chosen);
                        System.out.println("Your Propellant is: " + propellant_List_Chosen);
                        System.out.println("Your Reactor's Fuel is: " + reactor_Fuel_Chosen);
                        System.out.println("Your Altitude of operation is: " + altitude_Of_Operation_Chosen);
                        System.out.println("Your engine's nozzle type should be : " + nozzle_Type_List_Chosen);
                        System.out.println("Tank repressurisation would be done " + tank_Repressurisation_Chosen + "\n");
                        XWPFDocument docx = new XWPFDocument();
                        if (new File(String.valueOf(pathn1)).exists()) {
                            docx = new XWPFDocument(new FileInputStream(String.valueOf(pathn1)));
                        }
                        XWPFParagraph par = docx.createParagraph();
                        XWPFRun run = par.createRun();
                        run.setFontSize(12);
                        run.setBold(true);
                        run.setFontFamily("Calibri");
                        run.setText("Your Engine is called: ");
                        XWPFRun run2 = par.createRun();
                        run2.setFontSize(12);
                        run.setBold(true);
                        run2.setFontFamily("Calibri");
                        run2.setText(engine_Name);
                        run2.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run3 = par.createRun();
                        run3.setFontSize(10);
                        run3.setBold(true);
                        run3.setFontFamily("Calibri");
                        run3.setText("Your Engine Cycle is: ");
                        XWPFRun run4 = par.createRun();
                        run4.setFontSize(10);
                        run4.setFontFamily("Calibri");
                        run4.setText(nuclear_Cycle_Chosen + " " + engine_Cycle_Chosen);
                        run4.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run5 = par.createRun();
                        run5.setFontSize(10);
                        run5.setBold(true);
                        run5.setFontFamily("Calibri");
                        run5.setText("Your Propellant is: ");
                        XWPFRun run6 = par.createRun();
                        run6.setFontSize(10);
                        run6.setFontFamily("Calibri");
                        run6.setText(propellant_List_Chosen);
                        run6.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run7 = par.createRun();
                        run7.setFontSize(10);
                        run7.setBold(true);
                        run7.setFontFamily("Calibri");
                        run7.setText("Your Reactor's Fission Fuel is: ");
                        XWPFRun run8 = par.createRun();
                        run8.setFontSize(10);
                        run8.setFontFamily("Calibri");
                        run8.setText(reactor_Fuel_Chosen);
                        run8.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run9 = par.createRun();
                        run9.setFontSize(10);
                        run9.setBold(true);
                        run9.setFontFamily("Calibri");
                        run9.setText("Your engine's nozzle type should be: ");
                        XWPFRun run0 = par.createRun();
                        run0.setFontSize(10);
                        run0.setFontFamily("Calibri");
                        run0.setText(nozzle_Type_List_Chosen);
                        run0.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run11 = par.createRun();
                        run11.setFontSize(10);
                        run11.setBold(true);
                        run11.setFontFamily("Calibri");
                        run11.setText("Tank repressurisation would be done ");
                        XWPFRun run12 = par.createRun();
                        run12.setFontSize(10);
                        run12.setBold(true);
                        run12.setFontFamily("Calibri");
                        run12.setText(tank_Repressurisation_Chosen);
                        run12.addBreak();
                        // -----------------------------------------------------------
                        try (FileOutputStream out = new FileOutputStream(String.valueOf(pathn1))) {
                            docx.write(out);
                        }

                    } case "Monopropellant (Decomposition)"-> {
                        // Propellant (Decomposing Monopropellant)
                        Collections.shuffle(Arrays.asList(propellant_List1));
                        Random propellantChosen = new Random();
                        int propellantChosen_index = propellantChosen.nextInt(propellant_List1.length);
                        String propellant_List_Chosen = propellant_List1[propellantChosen_index];
                        // Altitude of Operation (Decomposing Monopropellant)
                        String altitude_Of_Operation_Chosen = "80 km+ (Vacuum)";
                        // Nozzle Type (Decomposing Monopropellant)
                        Collections.shuffle(Arrays.asList(nozzle_Type_List1));
                        Random nozzle_chosen = new Random();
                        int nozzleChosen_index = nozzle_chosen.nextInt(nozzle_Type_List1.length);
                        String nozzle_Type_List_Chosen = nozzle_Type_List1[nozzleChosen_index];
                        // Beautiful Part (Least non-ugly)
                        System.out.println(lbrk + "\n" + "Your Engine is called: " + engine_Name + "\n");
                        System.out.println("Your Engine Cycle is: " + engine_Cycle_Chosen);
                        System.out.println("Your Propellant is: " + propellant_List_Chosen);
                        System.out.println("Your Altitude of operation is: " + altitude_Of_Operation_Chosen);
                        System.out.println("Your engine's nozzle type should be : " + nozzle_Type_List_Chosen);
                        System.out.println("Tank repressurisation would be impractical and unnecessary" + "\n");
                        XWPFDocument docx = new XWPFDocument();
                        if (new File(String.valueOf(pathn1)).exists()) {
                            docx = new XWPFDocument(new FileInputStream(String.valueOf(pathn1)));
                        }
                        XWPFParagraph par = docx.createParagraph();
                        XWPFRun run = par.createRun();
                        run.setFontSize(12);
                        run.setBold(true);
                        run.setFontFamily("Calibri");
                        run.setText("Your Engine is called: ");
                        XWPFRun run2 = par.createRun();
                        run2.setFontSize(12);
                        run.setBold(true);
                        run2.setFontFamily("Calibri");
                        run2.setText(engine_Name);
                        run2.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run3 = par.createRun();
                        run3.setFontSize(10);
                        run3.setBold(true);
                        run3.setFontFamily("Calibri");
                        run3.setText("Your Engine Cycle is: ");
                        XWPFRun run4 = par.createRun();
                        run4.setFontSize(10);
                        run4.setFontFamily("Calibri");
                        run4.setText(engine_Cycle_Chosen);
                        run4.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run5 = par.createRun();
                        run5.setFontSize(10);
                        run5.setBold(true);
                        run5.setFontFamily("Calibri");
                        run5.setText("Your Propellant is: ");
                        XWPFRun run6 = par.createRun();
                        run6.setFontSize(10);
                        run6.setFontFamily("Calibri");
                        run6.setText(propellant_List_Chosen);
                        run6.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run9 = par.createRun();
                        run9.setFontSize(10);
                        run9.setBold(true);
                        run9.setFontFamily("Calibri");
                        run9.setText("Your engine's nozzle type should be: ");
                        XWPFRun run0 = par.createRun();
                        run0.setFontSize(10);
                        run0.setFontFamily("Calibri");
                        run0.setText(nozzle_Type_List_Chosen);
                        run0.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run11 = par.createRun();
                        run11.setFontSize(10);
                        run11.setBold(true);
                        run11.setFontFamily("Calibri");
                        run11.setText("Tank repressurisation would be impractical and unnecessary");
                        run11.addBreak();
                        // -----------------------------------------------------------
                        try (FileOutputStream out = new FileOutputStream(String.valueOf(pathn1))) {
                            docx.write(out);
                        }

                    } case "Monopropellant (Cold Gas)" -> {
                        Collections.shuffle(Arrays.asList(propellant_List2));
                        Random propellantChosen = new Random();
                        int propellantChosen_index = propellantChosen.nextInt(propellant_List2.length);
                        String propellant_List_Chosen = propellant_List2[propellantChosen_index];
                        // Altitude of Operation (Decomposing Monopropellant)
                        String altitude_Of_Operation_Chosen = "80 km+ (Vacuum)";
                        // Nozzle Type (Decomposing Monopropellant)
                        Collections.shuffle(Arrays.asList(nozzle_Type_List1));
                        Random nozzle_chosen = new Random();
                        int nozzleChosen_index = nozzle_chosen.nextInt(nozzle_Type_List1.length);
                        String nozzle_Type_List_Chosen = nozzle_Type_List1[nozzleChosen_index];
                        // Beautiful Part (Least non-ugly)
                        System.out.println(lbrk + "\n" + "Your Engine is called: " + engine_Name + "\n");
                        System.out.println("Your Engine Cycle is: " + engine_Cycle_Chosen);
                        System.out.println("Your Propellant is: " + propellant_List_Chosen);
                        System.out.println("Your Altitude of operation is: " + altitude_Of_Operation_Chosen);
                        System.out.println("Your engine's nozzle type should be : " + nozzle_Type_List_Chosen);
                        System.out.println("Tank repressurisation would be impractical and unnecessary" + "\n");
                        XWPFDocument docx = new XWPFDocument();
                        if (new File(String.valueOf(pathn1)).exists()) {
                            docx = new XWPFDocument(new FileInputStream(String.valueOf(pathn1)));
                        }
                        XWPFParagraph par = docx.createParagraph();
                        XWPFRun run = par.createRun();
                        run.setFontSize(12);
                        run.setBold(true);
                        run.setFontFamily("Calibri");
                        run.setText("Your Engine is called: ");
                        XWPFRun run2 = par.createRun();
                        run2.setFontSize(12);
                        run.setBold(true);
                        run2.setFontFamily("Calibri");
                        run2.setText(engine_Name);
                        run2.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run3 = par.createRun();
                        run3.setFontSize(10);
                        run3.setBold(true);
                        run3.setFontFamily("Calibri");
                        run3.setText("Your Engine Cycle is: ");
                        XWPFRun run4 = par.createRun();
                        run4.setFontSize(10);
                        run4.setFontFamily("Calibri");
                        run4.setText(engine_Cycle_Chosen);
                        run4.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run5 = par.createRun();
                        run5.setFontSize(10);
                        run5.setBold(true);
                        run5.setFontFamily("Calibri");
                        run5.setText("Your Propellant is: ");
                        XWPFRun run6 = par.createRun();
                        run6.setFontSize(10);
                        run6.setFontFamily("Calibri");
                        run6.setText(propellant_List_Chosen);
                        run6.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run9 = par.createRun();
                        run9.setFontSize(10);
                        run9.setBold(true);
                        run9.setFontFamily("Calibri");
                        run9.setText("Your engine's nozzle type should be: ");
                        XWPFRun run0 = par.createRun();
                        run0.setFontSize(10);
                        run0.setFontFamily("Calibri");
                        run0.setText(nozzle_Type_List_Chosen);
                        run0.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run11 = par.createRun();
                        run11.setFontSize(10);
                        run11.setBold(true);
                        run11.setFontFamily("Calibri");
                        run11.setText("Tank repressurisation would be impractical and unnecessary");
                        run11.addBreak();
                        // -----------------------------------------------------------
                        try (FileOutputStream out = new FileOutputStream(String.valueOf(pathn1))) {
                            docx.write(out);
                        }

                    } case "Expander (Closed)", "Expander (Open)" -> {
                        String[] oxidizer_List2 = {"O2 (Oxygen)", "F2 (Fluorine)", "F2 (Fluorine) + O2 (Oxygen)",
                                "O3 (Ozone)"};
                        Collections.shuffle(Arrays.asList(oxidizer_List2));
                        Random oxidizerChosen = new Random();
                        int oxidizerChosen_index = oxidizerChosen.nextInt(oxidizer_List2.length);
                        String oxidizer_Chosen = oxidizer_List2[oxidizerChosen_index];
                        String fuel_Chosen = "";
                        switch (oxidizer_Chosen) {
                            case "O2 (Oxygen)" -> {
                                String[] fuel_List20 = {"H2 (Hydrogen)", "CH4 (Methane)", "C2H5OH(Ethanol) 85%", "C2H5OH(Ethanol) 75%",
                                        "C6H5NH2 (Aniline)", "NH3 (Ammonia)", "CH6N2 (MonomethylHydrazine)", "N2H4 (Hydrazine)",
                                        "CH3OH (Methanol)", "C12H24 (Kerosene)", "B2H6 (Diborane)", "B5H9 (Pentaborane)", "C2H6 (Ethane)"};
                                Collections.shuffle(Arrays.asList(fuel_List20));
                                Random fuelChosen = new Random();
                                int fuelChosen_index = fuelChosen.nextInt(fuel_List20.length);
                                fuel_Chosen = fuel_List20[fuelChosen_index];
                            } case "F2 (Fluorine)" -> {
                                String[] fuel_List1 = {"H2 (Hydrogen)", "CH4 (Methane)", "C2H5OH(Ethanol) 85%", "C2H5OH(Ethanol) 75%",
                                        "C6H5NH2 (Aniline)", "NH3 (Ammonia)", "C2H8N2 (UnsymetricalDimethylHydrazine)",
                                        "CH6N2 (MonomethylHydrazine)", "N2H4 (Hydrazine)", "CH3OH (Methanol)", "C12H24 (Kerosene)",
                                        "B2H6 (Diborane)", "B5H9 (Pentaborane)", "C2H6 (Ethane)"};
                                Collections.shuffle(Arrays.asList(fuel_List1));
                                Random fuelChosen = new Random();
                                int fuelChosen_index = fuelChosen.nextInt(fuel_List1.length);
                                fuel_Chosen = fuel_List1[fuelChosen_index];
                            } case "F2 (Fluorine) + O2 (Oxygen)", "O3 (Ozone)" -> {
                                String[] fuel_List2 = {"H2 (Hydrogen)", "N2H4 (Hydrazine)", "CH3OH (Methanol)",
                                        "C12H24 (Kerosene)", "B2H6 (Diborane)", "B5H9 (Pentaborane)", "C2H6 (Ethane)"};
                                Collections.shuffle(Arrays.asList(fuel_List2));
                                Random fuelChosen = new Random();
                                int fuelChosen_index = fuelChosen.nextInt(fuel_List2.length);
                                fuel_Chosen = fuel_List2[fuelChosen_index];
                            }
                        }

                        Collections.shuffle(Arrays.asList(altitude_Of_Operation));
                        Random altitudeOfOperationChosen = new Random();
                        int altitudeOfOperationChosen_index = altitudeOfOperationChosen.nextInt(altitude_Of_Operation.length);
                        String altitude_Of_Operation_Chosen = altitude_Of_Operation[altitudeOfOperationChosen_index];

                        String nozzle_Type_Chosen = "";
                        switch (altitude_Of_Operation_Chosen) {
                            case "0-10 km (Sea Level)" -> {
                                String[] nozzle_Type_List_SL = {"De Laval Cone (Without Nozzle Extension)",
                                        "De Laval Bell (Without Nozzle Extension)"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_SL));
                                Random nozzleTypeSLspikeChosen = new Random();
                                int nozzleTypeSLspikeChosen_index = nozzleTypeSLspikeChosen.nextInt(nozzle_Type_List_SL.length);
                                nozzle_Type_Chosen = nozzle_Type_List_SL[nozzleTypeSLspikeChosen_index];
                            } case "20-30 km (Medium Atmosphere)" -> {
                                String[] nozzle_Type_List_HA = {"De Laval Bell (Without Nozzle Extension)", "De Laval Cone (With Nozzle Extension)",
                                        "De Laval Bell (With Nozzle Extension)", "Dual Bell Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_HA));
                                Random nozzleTypeHAspikeChosen = new Random();
                                int nozzleTypeHAspikeChosen_index = nozzleTypeHAspikeChosen.nextInt(nozzle_Type_List_HA.length);
                                nozzle_Type_Chosen = nozzle_Type_List_HA[nozzleTypeHAspikeChosen_index];
                            } case "30-80 km (High Atmosphere)" -> {
                                String[] nozzle_Type_List_HAi = {"De Laval Cone (With Nozzle Extension)", "De Laval Bell (With Nozzle Extension)",
                                        "Dual Bell Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_HAi));
                                Random nozzleTypeHAispikeChosen = new Random();
                                int nozzleTypeHAispikeChosen_index = nozzleTypeHAispikeChosen.nextInt(nozzle_Type_List_HAi.length);
                                nozzle_Type_Chosen = nozzle_Type_List_HAi[nozzleTypeHAispikeChosen_index];
                            } case "80 km+ (Vacuum)" -> {
                                String[] nozzle_Type_List_VA = {"De Laval Cone (With Nozzle Extension)",
                                        "De Laval Bell (With Nozzle Extension)", "Expanding Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_VA));
                                Random nozzleTypeVAspikeChosen = new Random();
                                int nozzleTypeVAspikeChosen_index = nozzleTypeVAspikeChosen.nextInt(nozzle_Type_List_VA.length);
                                nozzle_Type_Chosen = nozzle_Type_List_VA[nozzleTypeVAspikeChosen_index];
                            } case "Any Altitude (0-80 km+)" -> {
                                String[] nozzle_Type_List_Aero = {"Linear Aerospike Nozzle", "Toroidal Aerospike Nozzle", "Expansion-Deflection Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_Aero));
                                Random nozzleTypeAerospikeChosen = new Random();
                                int nozzleTypeAerospikeChosen_index = nozzleTypeAerospikeChosen.nextInt(nozzle_Type_List_Aero.length);
                                nozzle_Type_Chosen = nozzle_Type_List_Aero[nozzleTypeAerospikeChosen_index];
                            }
                        }

                        System.out.println(lbrk + "\n" + "Your Engine is called: " + engine_Name + "\n");
                        System.out.println("Your Engine Cycle is: " + engine_Cycle_Chosen);
                        System.out.println("Your oxidizer is: " + oxidizer_Chosen);
                        System.out.println("Your Fuel is: " + fuel_Chosen);
                        System.out.println("Your Altitude of operation is: " + altitude_Of_Operation_Chosen);
                        System.out.println("Your engine's nozzle type should be : " + nozzle_Type_Chosen);
                        System.out.println("Tank repressurisation would be done Autogenously" + "\n");
                        XWPFDocument docx = new XWPFDocument();
                        if (new File(String.valueOf(pathn1)).exists()) {
                            docx = new XWPFDocument(new FileInputStream(String.valueOf(pathn1)));
                        }
                        XWPFParagraph par = docx.createParagraph();
                        XWPFRun run = par.createRun();
                        run.setFontSize(12);
                        run.setBold(true);
                        run.setFontFamily("Calibri");
                        run.setText("Your Engine is called: ");
                        XWPFRun run2 = par.createRun();
                        run2.setFontSize(12);
                        run.setBold(true);
                        run2.setFontFamily("Calibri");
                        run2.setText(engine_Name);
                        run2.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run3 = par.createRun();
                        run3.setFontSize(10);
                        run3.setBold(true);
                        run3.setFontFamily("Calibri");
                        run3.setText("Your Engine Cycle is: ");
                        XWPFRun run4 = par.createRun();
                        run4.setFontSize(10);
                        run4.setFontFamily("Calibri");
                        run4.setText(engine_Cycle_Chosen);
                        run4.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run5 = par.createRun();
                        run5.setFontSize(10);
                        run5.setBold(true);
                        run5.setFontFamily("Calibri");
                        run5.setText("Your oxidizer is: ");
                        XWPFRun run6 = par.createRun();
                        run6.setFontSize(10);
                        run6.setFontFamily("Calibri");
                        run6.setText(oxidizer_Chosen);
                        run6.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run8 = par.createRun();
                        run8.setFontSize(10);
                        run8.setBold(true);
                        run8.setFontFamily("Calibri");
                        run8.setText("Your Fuel is: ");
                        XWPFRun run7 = par.createRun();
                        run7.setFontSize(10);
                        run7.setFontFamily("Calibri");
                        run7.setText(fuel_Chosen);
                        run7.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run9 = par.createRun();
                        run9.setFontSize(10);
                        run9.setBold(true);
                        run9.setFontFamily("Calibri");
                        run9.setText("Your engine's nozzle type should be: ");
                        XWPFRun run0 = par.createRun();
                        run0.setFontSize(10);
                        run0.setFontFamily("Calibri");
                        run0.setText(nozzle_Type_Chosen);
                        run0.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run11 = par.createRun();
                        run11.setFontSize(10);
                        run11.setBold(true);
                        run11.setFontFamily("Calibri");
                        run11.setText("Tank repressurisation would be done ");
                        XWPFRun run12 = par.createRun();
                        run12.setFontSize(10);
                        run12.setBold(true);
                        run12.setFontFamily("Calibri");
                        run12.setText("Autogenously");
                        run12.addBreak();
                        // -----------------------------------------------------------
                        try (FileOutputStream out = new FileOutputStream(String.valueOf(pathn1))) {
                            docx.write(out);
                        }
                    } case "Dual Expander (Closed)", "Dual Expander (Open)" -> {
                        String[] oxidizer_List3 = {"O2 (Oxygen)", "F2 (Fluorine)", "F2 (Fluorine) + O2 (Oxygen)"};
                        Collections.shuffle(Arrays.asList(oxidizer_List3));
                        Random oxidizerChosen = new Random();
                        int oxidizerChosen_index = oxidizerChosen.nextInt(oxidizer_List3.length);
                        String oxidizer_Chosen = oxidizer_List3[oxidizerChosen_index];

                        String fuel_Chosen = "";
                        String[] fuel_List3 = {"H2 (Hydrogen)", "CH4 (Methane)"};
                        switch (oxidizer_Chosen) {
                            case "O2 (Oxygen)", "F2 (Fluorine)" -> {
                                Collections.shuffle(Arrays.asList(fuel_List3));
                                Random fuelChosen = new Random();
                                int fuelChosen_index = fuelChosen.nextInt(fuel_List3.length);
                                fuel_Chosen = fuel_List3[fuelChosen_index];
                            } case "F2 (Fluorine) + O2 (Oxygen)" -> fuel_Chosen = "H2 (Hydrogen)";
                        }

                        Collections.shuffle(Arrays.asList(altitude_Of_Operation));
                        Random altitudeOfOperationChosen = new Random();
                        int altitudeOfOperationChosen_index = altitudeOfOperationChosen.nextInt(altitude_Of_Operation.length);
                        String altitude_Of_Operation_Chosen = altitude_Of_Operation[altitudeOfOperationChosen_index];

                        String nozzle_Type_Chosen = "";
                        switch (altitude_Of_Operation_Chosen) {
                            case "0-10 km (Sea Level)" -> {
                                String[] nozzle_Type_List_SL = {"De Laval Cone (Without Nozzle Extension)",
                                        "De Laval Bell (Without Nozzle Extension)"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_SL));
                                Random nozzleTypeSLspikeChosen = new Random();
                                int nozzleTypeSLspikeChosen_index = nozzleTypeSLspikeChosen.nextInt(nozzle_Type_List_SL.length);
                                nozzle_Type_Chosen = nozzle_Type_List_SL[nozzleTypeSLspikeChosen_index];
                            } case "20-30 km (Medium Atmosphere)" -> {
                                String[] nozzle_Type_List_HA = {"De Laval Bell (Without Nozzle Extension)", "De Laval Cone (With Nozzle Extension)",
                                        "De Laval Bell (With Nozzle Extension)", "Dual Bell Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_HA));
                                Random nozzleTypeHAspikeChosen = new Random();
                                int nozzleTypeHAspikeChosen_index = nozzleTypeHAspikeChosen.nextInt(nozzle_Type_List_HA.length);
                                nozzle_Type_Chosen = nozzle_Type_List_HA[nozzleTypeHAspikeChosen_index];
                            } case "30-80 km (High Atmosphere)" -> {
                                String[] nozzle_Type_List_HAi = {"De Laval Cone (With Nozzle Extension)", "De Laval Bell (With Nozzle Extension)",
                                        "Dual Bell Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_HAi));
                                Random nozzleTypeHAispikeChosen = new Random();
                                int nozzleTypeHAispikeChosen_index = nozzleTypeHAispikeChosen.nextInt(nozzle_Type_List_HAi.length);
                                nozzle_Type_Chosen = nozzle_Type_List_HAi[nozzleTypeHAispikeChosen_index];
                            } case "80 km+ (Vacuum)" -> {
                                String[] nozzle_Type_List_VA = {"De Laval Cone (With Nozzle Extension)",
                                        "De Laval Bell (With Nozzle Extension)", "Expanding Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_VA));
                                Random nozzleTypeVAspikeChosen = new Random();
                                int nozzleTypeVAspikeChosen_index = nozzleTypeVAspikeChosen.nextInt(nozzle_Type_List_VA.length);
                                nozzle_Type_Chosen = nozzle_Type_List_VA[nozzleTypeVAspikeChosen_index];
                            } case "Any Altitude (0-80 km+)" -> {
                                String[] nozzle_Type_List_Aero = {"Linear Aerospike Nozzle", "Toroidal Aerospike Nozzle", "Expansion-Deflection Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_Aero));
                                Random nozzleTypeAerospikeChosen = new Random();
                                int nozzleTypeAerospikeChosen_index = nozzleTypeAerospikeChosen.nextInt(nozzle_Type_List_Aero.length);
                                nozzle_Type_Chosen = nozzle_Type_List_Aero[nozzleTypeAerospikeChosen_index];
                            }
                        }

                        System.out.println(lbrk + "\n" + "Your Engine is called: " + engine_Name + "\n");
                        System.out.println("Your Engine Cycle is: " + engine_Cycle_Chosen);
                        System.out.println("Your oxidizer is: " + oxidizer_Chosen);
                        System.out.println("Your Fuel is: " + fuel_Chosen);
                        System.out.println("Your Altitude of operation is: " + altitude_Of_Operation_Chosen);
                        System.out.println("Your engine's nozzle type should be : " + nozzle_Type_Chosen);
                        System.out.println("Tank repressurisation would be done Autogenously" + "\n");
                        XWPFDocument docx = new XWPFDocument();
                        if (new File(String.valueOf(pathn1)).exists()) {
                            docx = new XWPFDocument(new FileInputStream(String.valueOf(pathn1)));
                        }
                        XWPFParagraph par = docx.createParagraph();
                        XWPFRun run = par.createRun();
                        run.setFontSize(12);
                        run.setBold(true);
                        run.setFontFamily("Calibri");
                        run.setText("Your Engine is called: ");
                        XWPFRun run2 = par.createRun();
                        run2.setFontSize(12);
                        run.setBold(true);
                        run2.setFontFamily("Calibri");
                        run2.setText(engine_Name);
                        run2.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run3 = par.createRun();
                        run3.setFontSize(10);
                        run3.setBold(true);
                        run3.setFontFamily("Calibri");
                        run3.setText("Your Engine Cycle is: ");
                        XWPFRun run4 = par.createRun();
                        run4.setFontSize(10);
                        run4.setFontFamily("Calibri");
                        run4.setText(engine_Cycle_Chosen);
                        run4.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run5 = par.createRun();
                        run5.setFontSize(10);
                        run5.setBold(true);
                        run5.setFontFamily("Calibri");
                        run5.setText("Your oxidizer is: ");
                        XWPFRun run6 = par.createRun();
                        run6.setFontSize(10);
                        run6.setFontFamily("Calibri");
                        run6.setText(oxidizer_Chosen);
                        run6.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run8 = par.createRun();
                        run8.setFontSize(10);
                        run8.setBold(true);
                        run8.setFontFamily("Calibri");
                        run8.setText("Your Fuel is: ");
                        XWPFRun run7 = par.createRun();
                        run7.setFontSize(10);
                        run7.setFontFamily("Calibri");
                        run7.setText(fuel_Chosen);
                        run7.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run9 = par.createRun();
                        run9.setFontSize(10);
                        run9.setBold(true);
                        run9.setFontFamily("Calibri");
                        run9.setText("Your engine's nozzle type should be: ");
                        XWPFRun run0 = par.createRun();
                        run0.setFontSize(10);
                        run0.setFontFamily("Calibri");
                        run0.setText(nozzle_Type_Chosen);
                        run0.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run11 = par.createRun();
                        run11.setFontSize(10);
                        run11.setBold(true);
                        run11.setFontFamily("Calibri");
                        run11.setText("Tank repressurisation would be done ");
                        XWPFRun run12 = par.createRun();
                        run12.setFontSize(10);
                        run12.setBold(true);
                        run12.setFontFamily("Calibri");
                        run12.setText("Autogenously");
                        run12.addBreak();
                        // -----------------------------------------------------------
                        try (FileOutputStream out = new FileOutputStream(String.valueOf(pathn1))) {
                            docx.write(out);
                        }
                    } case "Staged Combustion (Fuel Rich)" -> {
                        String[] oxidizer_List4 = {"O2 (Oxygen)", "F2 (Fluorine)", "F2 (Fluorine) + O2 (Oxygen)",
                                "N2H4 (Hydrazine)", "O3 (Ozone)"};
                        Collections.shuffle(Arrays.asList(oxidizer_List4));
                        Random oxidizerChosen = new Random();
                        int oxidizerChosen_index = oxidizerChosen.nextInt(oxidizer_List4.length);
                        String oxidizer_Chosen = oxidizer_List4[oxidizerChosen_index];

                        String fuel_Chosen = "";
                        switch (oxidizer_Chosen) {
                            case "O2 (Oxygen)", "F2 (Fluorine)" -> {
                                String[] fuel_List4 = {"H2 (Hydrogen)", "NH3 (Ammonia)", "N2H4 (Hydrazine)", "B2H6 (Diborane)",
                                        "B5H9 (Pentaborane)"};
                                Collections.shuffle(Arrays.asList(fuel_List4));
                                Random fuelChosen = new Random();
                                int fuelChosen_index = fuelChosen.nextInt(fuel_List4.length);
                                fuel_Chosen = fuel_List4[fuelChosen_index];
                            } case "F2 (Fluorine) + O2 (Oxygen)", "O3 (Ozone)" -> {
                                String[] fuel_List6 = {"H2 (Hydrogen)", "B2H6 (Diborane)", "B5H9 (Pentaborane)"};
                                Collections.shuffle(Arrays.asList(fuel_List6));
                                Random fuelChosen = new Random();
                                int fuelChosen_index = fuelChosen.nextInt(fuel_List6.length);
                                fuel_Chosen = fuel_List6[fuelChosen_index];
                            } case "N2H4 (Hydrazine)" -> {
                                String[] fuel_List7 = {"H2 (Hydrogen)", "B2H6 (Diborane)"};
                                Collections.shuffle(Arrays.asList(fuel_List7));
                                Random fuelChosen = new Random();
                                int fuelChosen_index = fuelChosen.nextInt(fuel_List7.length);
                                fuel_Chosen = fuel_List7[fuelChosen_index];
                            }
                        }
                        Collections.shuffle(Arrays.asList(tank_Repressurisation));
                        Random tankRepressurisationChosen = new Random();
                        int tankRepressurisationChosen_index = tankRepressurisationChosen.nextInt(tank_Repressurisation.length);
                        String tank_Repressurisation_Chosen = tank_Repressurisation[tankRepressurisationChosen_index];

                        Collections.shuffle(Arrays.asList(altitude_Of_Operation));
                        Random altitudeOfOperationChosen = new Random();
                        int altitudeOfOperationChosen_index = altitudeOfOperationChosen.nextInt(altitude_Of_Operation.length);
                        String altitude_Of_Operation_Chosen = altitude_Of_Operation[altitudeOfOperationChosen_index];

                        String nozzle_Type_Chosen = "";
                        switch (altitude_Of_Operation_Chosen) {
                            case "0-10 km (Sea Level)" -> {
                                String[] nozzle_Type_List_SL = {"De Laval Cone (Without Nozzle Extension)",
                                        "De Laval Bell (Without Nozzle Extension)"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_SL));
                                Random nozzleTypeSLspikeChosen = new Random();
                                int nozzleTypeSLspikeChosen_index = nozzleTypeSLspikeChosen.nextInt(nozzle_Type_List_SL.length);
                                nozzle_Type_Chosen = nozzle_Type_List_SL[nozzleTypeSLspikeChosen_index];
                            } case "20-30 km (Medium Atmosphere)" -> {
                                String[] nozzle_Type_List_HA = {"De Laval Bell (Without Nozzle Extension)", "De Laval Cone (With Nozzle Extension)",
                                        "De Laval Bell (With Nozzle Extension)", "Dual Bell Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_HA));
                                Random nozzleTypeHAspikeChosen = new Random();
                                int nozzleTypeHAspikeChosen_index = nozzleTypeHAspikeChosen.nextInt(nozzle_Type_List_HA.length);
                                nozzle_Type_Chosen = nozzle_Type_List_HA[nozzleTypeHAspikeChosen_index];
                            } case "30-80 km (High Atmosphere)" -> {
                                String[] nozzle_Type_List_HAi = {"De Laval Cone (With Nozzle Extension)", "De Laval Bell (With Nozzle Extension)",
                                        "Dual Bell Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_HAi));
                                Random nozzleTypeHAispikeChosen = new Random();
                                int nozzleTypeHAispikeChosen_index = nozzleTypeHAispikeChosen.nextInt(nozzle_Type_List_HAi.length);
                                nozzle_Type_Chosen = nozzle_Type_List_HAi[nozzleTypeHAispikeChosen_index];
                            } case "80 km+ (Vacuum)" -> {
                                String[] nozzle_Type_List_VA = {"De Laval Cone (With Nozzle Extension)",
                                        "De Laval Bell (With Nozzle Extension)", "Expanding Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_VA));
                                Random nozzleTypeVAspikeChosen = new Random();
                                int nozzleTypeVAspikeChosen_index = nozzleTypeVAspikeChosen.nextInt(nozzle_Type_List_VA.length);
                                nozzle_Type_Chosen = nozzle_Type_List_VA[nozzleTypeVAspikeChosen_index];
                            } case "Any Altitude (0-80 km+)" -> {
                                String[] nozzle_Type_List_Aero = {"Linear Aerospike Nozzle", "Toroidal Aerospike Nozzle", "Expansion-Deflection Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_Aero));
                                Random nozzleTypeAerospikeChosen = new Random();
                                int nozzleTypeAerospikeChosen_index = nozzleTypeAerospikeChosen.nextInt(nozzle_Type_List_Aero.length);
                                nozzle_Type_Chosen = nozzle_Type_List_Aero[nozzleTypeAerospikeChosen_index];
                            }
                        }

                        System.out.println(lbrk + "\n" + "Your Engine is called: " + engine_Name + "\n");
                        System.out.println("Your Engine Cycle is: " + engine_Cycle_Chosen);
                        System.out.println("Your oxidizer is: " + oxidizer_Chosen);
                        System.out.println("Your Fuel is: " + fuel_Chosen);
                        System.out.println("Your Altitude of operation is: " + altitude_Of_Operation_Chosen);
                        System.out.println("Your engine's nozzle type should be : " + nozzle_Type_Chosen);
                        System.out.println("Tank repressurisation would be done " + tank_Repressurisation_Chosen + "\n");
                        XWPFDocument docx = new XWPFDocument();
                        if (new File(String.valueOf(pathn1)).exists()) {
                            docx = new XWPFDocument(new FileInputStream(String.valueOf(pathn1)));
                        }
                        XWPFParagraph par = docx.createParagraph();
                        XWPFRun run = par.createRun();
                        run.setFontSize(12);
                        run.setBold(true);
                        run.setFontFamily("Calibri");
                        run.setText("Your Engine is called: ");
                        XWPFRun run2 = par.createRun();
                        run2.setFontSize(12);
                        run.setBold(true);
                        run2.setFontFamily("Calibri");
                        run2.setText(engine_Name);
                        run2.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run3 = par.createRun();
                        run3.setFontSize(10);
                        run3.setBold(true);
                        run3.setFontFamily("Calibri");
                        run3.setText("Your Engine Cycle is: ");
                        XWPFRun run4 = par.createRun();
                        run4.setFontSize(10);
                        run4.setFontFamily("Calibri");
                        run4.setText(engine_Cycle_Chosen);
                        run4.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run5 = par.createRun();
                        run5.setFontSize(10);
                        run5.setBold(true);
                        run5.setFontFamily("Calibri");
                        run5.setText("Your oxidizer is: ");
                        XWPFRun run6 = par.createRun();
                        run6.setFontSize(10);
                        run6.setFontFamily("Calibri");
                        run6.setText(oxidizer_Chosen);
                        run6.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run8 = par.createRun();
                        run8.setFontSize(10);
                        run8.setBold(true);
                        run8.setFontFamily("Calibri");
                        run8.setText("Your Fuel is: ");
                        XWPFRun run7 = par.createRun();
                        run7.setFontSize(10);
                        run7.setFontFamily("Calibri");
                        run7.setText(fuel_Chosen);
                        run7.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run9 = par.createRun();
                        run9.setFontSize(10);
                        run9.setBold(true);
                        run9.setFontFamily("Calibri");
                        run9.setText("Your engine's nozzle type should be: ");
                        XWPFRun run0 = par.createRun();
                        run0.setFontSize(10);
                        run0.setFontFamily("Calibri");
                        run0.setText(nozzle_Type_Chosen);
                        run0.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run11 = par.createRun();
                        run11.setFontSize(10);
                        run11.setBold(true);
                        run11.setFontFamily("Calibri");
                        run11.setText("Tank repressurisation would be done ");
                        XWPFRun run12 = par.createRun();
                        run12.setFontSize(10);
                        run12.setBold(true);
                        run12.setFontFamily("Calibri");
                        run12.setText(tank_Repressurisation_Chosen);
                        run12.addBreak();
                        // -----------------------------------------------------------
                        try (FileOutputStream out = new FileOutputStream(String.valueOf(pathn1))) {
                            docx.write(out);
                        }
                    } case "Full Flow Staged Combustion", "Combustion Tap Off" -> {
                        String[] oxidizer_List4 = {"O2 (Oxygen)", "F2 (Fluorine)", "F2 (Fluorine) + O2 (Oxygen)",
                                "N2H4 (Hydrazine)", "O3 (Ozone)"};
                        Collections.shuffle(Arrays.asList(oxidizer_List4));
                        Random oxidizerChosen = new Random();
                        int oxidizerChosen_index = oxidizerChosen.nextInt(oxidizer_List4.length);
                        String oxidizer_Chosen = oxidizer_List4[oxidizerChosen_index];

                        String fuel_Chosen = "";
                        switch (oxidizer_Chosen) {
                            case "O2 (Oxygen)" -> {
                                String[] fuel_List4 = {"H2 (Hydrogen)", "CH4 (Methane)", "C2H5OH(Ethanol) 85%", "C2H5OH(Ethanol) 75%",
                                        "C6H5NH2 (Aniline)", "NH3 (Ammonia)", "CH6N2 (MonomethylHydrazine)", "N2H4 (Hydrazine)",
                                        "CH3OH (Methanol)", "B2H6 (Diborane)", "B5H9 (Pentaborane)", "C2H6 (Ethane)"};
                                Collections.shuffle(Arrays.asList(fuel_List4));
                                Random fuelChosen = new Random();
                                int fuelChosen_index = fuelChosen.nextInt(fuel_List4.length);
                                fuel_Chosen = fuel_List4[fuelChosen_index];
                            } case "F2 (Fluorine)" -> {
                                String[] fuel_List5 = {"H2 (Hydrogen)", "CH4 (Methane)", "C2H5OH(Ethanol) 85%", "C2H5OH(Ethanol) 75%",
                                        "NH3 (Ammonia)", "C2H8N2 (UnsymetricalDimethylHydrazine)", "CH6N2 (MonomethylHydrazine)",
                                        "N2H4 (Hydrazine)", "CH3OH (Methanol)", "B2H6 (Diborane)", "B5H9 (Pentaborane)", "C2H6 (Ethane)"};
                                Collections.shuffle(Arrays.asList(fuel_List5));
                                Random fuelChosen = new Random();
                                int fuelChosen_index = fuelChosen.nextInt(fuel_List5.length);
                                fuel_Chosen = fuel_List5[fuelChosen_index];
                            } case "F2 (Fluorine) + O2 (Oxygen)", "O3 (Ozone)" -> {
                                String[] fuel_List6 = {"H2 (Hydrogen)", "CH4 (Methane)", "C2H5OH(Ethanol) 85%", "C2H5OH(Ethanol) 75%",
                                        "C6H5NH2 (Aniline)", "75% CH6N2 + 25% N2H4 (UH-25)", "50% CH6N2 + 50% N2H4 (Aerosine-50)",
                                        "CH6N2 (MonomethylHydrazine)", "B2H6 (Diborane)", "B5H9 (Pentaborane)"};
                                Collections.shuffle(Arrays.asList(fuel_List6));
                                Random fuelChosen = new Random();
                                int fuelChosen_index = fuelChosen.nextInt(fuel_List6.length);
                                fuel_Chosen = fuel_List6[fuelChosen_index];
                            } case "N2H4 (Hydrazine)" -> {
                                String[] fuel_List7 = {"H2 (Hydrogen)", "C2H5OH(Ethanol) 85%", "C2H5OH(Ethanol) 75%",
                                        "C6H5NH2 (Aniline)", "75% CH6N2 + 25% N2H4 (UH-25)", "50% CH6N2 + 50% N2H4 (Aerosine-50)",
                                        "C2H8N2 (UnsymetricalDimethylHydrazine)", "CH3OH (Methanol)", "B2H6 (Diborane)"};
                                Collections.shuffle(Arrays.asList(fuel_List7));
                                Random fuelChosen = new Random();
                                int fuelChosen_index = fuelChosen.nextInt(fuel_List7.length);
                                fuel_Chosen = fuel_List7[fuelChosen_index];
                            }
                        }
                        Collections.shuffle(Arrays.asList(tank_Repressurisation));
                        Random tankRepressurisationChosen = new Random();
                        int tankRepressurisationChosen_index = tankRepressurisationChosen.nextInt(tank_Repressurisation.length);
                        String tank_Repressurisation_Chosen = tank_Repressurisation[tankRepressurisationChosen_index];

                        Collections.shuffle(Arrays.asList(altitude_Of_Operation));
                        Random altitudeOfOperationChosen = new Random();
                        int altitudeOfOperationChosen_index = altitudeOfOperationChosen.nextInt(altitude_Of_Operation.length);
                        String altitude_Of_Operation_Chosen = altitude_Of_Operation[altitudeOfOperationChosen_index];

                        String nozzle_Type_Chosen = "";
                        switch (altitude_Of_Operation_Chosen) {
                            case "0-10 km (Sea Level)" -> {
                                String[] nozzle_Type_List_SL = {"De Laval Cone (Without Nozzle Extension)",
                                        "De Laval Bell (Without Nozzle Extension)"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_SL));
                                Random nozzleTypeSLspikeChosen = new Random();
                                int nozzleTypeSLspikeChosen_index = nozzleTypeSLspikeChosen.nextInt(nozzle_Type_List_SL.length);
                                nozzle_Type_Chosen = nozzle_Type_List_SL[nozzleTypeSLspikeChosen_index];
                            } case "20-30 km (Medium Atmosphere)" -> {
                                String[] nozzle_Type_List_HA = {"De Laval Bell (Without Nozzle Extension)", "De Laval Cone (With Nozzle Extension)",
                                        "De Laval Bell (With Nozzle Extension)", "Dual Bell Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_HA));
                                Random nozzleTypeHAspikeChosen = new Random();
                                int nozzleTypeHAspikeChosen_index = nozzleTypeHAspikeChosen.nextInt(nozzle_Type_List_HA.length);
                                nozzle_Type_Chosen = nozzle_Type_List_HA[nozzleTypeHAspikeChosen_index];
                            } case "30-80 km (High Atmosphere)" -> {
                                String[] nozzle_Type_List_HAi = {"De Laval Cone (With Nozzle Extension)", "De Laval Bell (With Nozzle Extension)",
                                        "Dual Bell Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_HAi));
                                Random nozzleTypeHAispikeChosen = new Random();
                                int nozzleTypeHAispikeChosen_index = nozzleTypeHAispikeChosen.nextInt(nozzle_Type_List_HAi.length);
                                nozzle_Type_Chosen = nozzle_Type_List_HAi[nozzleTypeHAispikeChosen_index];
                            } case "80 km+ (Vacuum)" -> {
                                String[] nozzle_Type_List_VA = {"De Laval Cone (With Nozzle Extension)",
                                        "De Laval Bell (With Nozzle Extension)", "Expanding Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_VA));
                                Random nozzleTypeVAspikeChosen = new Random();
                                int nozzleTypeVAspikeChosen_index = nozzleTypeVAspikeChosen.nextInt(nozzle_Type_List_VA.length);
                                nozzle_Type_Chosen = nozzle_Type_List_VA[nozzleTypeVAspikeChosen_index];
                            } case "Any Altitude (0-80 km+)" -> {
                                String[] nozzle_Type_List_Aero = {"Linear Aerospike Nozzle", "Toroidal Aerospike Nozzle", "Expansion-Deflection Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_Aero));
                                Random nozzleTypeAerospikeChosen = new Random();
                                int nozzleTypeAerospikeChosen_index = nozzleTypeAerospikeChosen.nextInt(nozzle_Type_List_Aero.length);
                                nozzle_Type_Chosen = nozzle_Type_List_Aero[nozzleTypeAerospikeChosen_index];
                            }
                        }

                        System.out.println(lbrk + "\n" + "Your Engine is called: " + engine_Name + "\n");
                        System.out.println("Your Engine Cycle is: " + engine_Cycle_Chosen);
                        System.out.println("Your oxidizer is: " + oxidizer_Chosen);
                        System.out.println("Your Fuel is: " + fuel_Chosen);
                        System.out.println("Your Altitude of operation is: " + altitude_Of_Operation_Chosen);
                        System.out.println("Your engine's nozzle type should be : " + nozzle_Type_Chosen);
                        System.out.println("Tank repressurisation would be done " + tank_Repressurisation_Chosen + "\n");
                        XWPFDocument docx = new XWPFDocument();
                        if (new File(String.valueOf(pathn1)).exists()) {
                            docx = new XWPFDocument(new FileInputStream(String.valueOf(pathn1)));
                        }
                        XWPFParagraph par = docx.createParagraph();
                        XWPFRun run = par.createRun();
                        run.setFontSize(12);
                        run.setBold(true);
                        run.setFontFamily("Calibri");
                        run.setText("Your Engine is called: ");
                        XWPFRun run2 = par.createRun();
                        run2.setFontSize(12);
                        run.setBold(true);
                        run2.setFontFamily("Calibri");
                        run2.setText(engine_Name);
                        run2.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run3 = par.createRun();
                        run3.setFontSize(10);
                        run3.setBold(true);
                        run3.setFontFamily("Calibri");
                        run3.setText("Your Engine Cycle is: ");
                        XWPFRun run4 = par.createRun();
                        run4.setFontSize(10);
                        run4.setFontFamily("Calibri");
                        run4.setText(engine_Cycle_Chosen);
                        run4.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run5 = par.createRun();
                        run5.setFontSize(10);
                        run5.setBold(true);
                        run5.setFontFamily("Calibri");
                        run5.setText("Your oxidizer is: ");
                        XWPFRun run6 = par.createRun();
                        run6.setFontSize(10);
                        run6.setFontFamily("Calibri");
                        run6.setText(oxidizer_Chosen);
                        run6.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run8 = par.createRun();
                        run8.setFontSize(10);
                        run8.setBold(true);
                        run8.setFontFamily("Calibri");
                        run8.setText("Your Fuel is: ");
                        XWPFRun run7 = par.createRun();
                        run7.setFontSize(10);
                        run7.setFontFamily("Calibri");
                        run7.setText(fuel_Chosen);
                        run7.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run9 = par.createRun();
                        run9.setFontSize(10);
                        run9.setBold(true);
                        run9.setFontFamily("Calibri");
                        run9.setText("Your engine's nozzle type should be: ");
                        XWPFRun run0 = par.createRun();
                        run0.setFontSize(10);
                        run0.setFontFamily("Calibri");
                        run0.setText(nozzle_Type_Chosen);
                        run0.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run11 = par.createRun();
                        run11.setFontSize(10);
                        run11.setBold(true);
                        run11.setFontFamily("Calibri");
                        run11.setText("Tank repressurisation would be done ");
                        XWPFRun run12 = par.createRun();
                        run12.setFontSize(10);
                        run12.setBold(true);
                        run12.setFontFamily("Calibri");
                        run12.setText(tank_Repressurisation_Chosen);
                        run12.addBreak();
                        // -----------------------------------------------------------
                        try (FileOutputStream out = new FileOutputStream(String.valueOf(pathn1))) {
                            docx.write(out);
                        }
                    } default -> {
                        String[] oxidizer_List6 = {"O2 (Oxygen)", "F2 (Fluorine)", "F2 (Fluorine) + O2 (Oxygen)",
                                "N2O4 (Nitrogen Tetroxide)", "N2H4 (Hydrazine)", "H2O2 (Hydrogen Peroxide) 95%",
                                "H2O2 (Hydrogen Peroxide) 85%", "O3 (Ozone)", "AK20F: 80% HNO3 + 20% N2O4 (Nitric Acid)",
                                "AK20I: 80% HNO3 + 20% N2O4 (Nitric Acid)", "AK20K: 80% HNO3 + 20% N2O4 (Nitric Acid)",
                                "AK27I: 73% HNO3 + 27% N2O4 (Nitric Acid)", "AK27P: 73% HNO3 + 27% N2O4 (Nitric Acid)",
                                "ClF3 (Chlorine Trifluoride)", "ClF5 (Chlorine Pentafluoride)"};
                        Collections.shuffle(Arrays.asList(oxidizer_List6));
                        Random oxidizerChosen = new Random();
                        int oxidizerChosen_index = oxidizerChosen.nextInt(oxidizer_List6.length);
                        String oxidizer_Chosen = oxidizer_List6[oxidizerChosen_index];

                        String fuel_Chosen = "";
                        switch (oxidizer_Chosen) {
                            case "O2 (Oxygen)" -> {
                                String[] fuel_List8 = {"H2 (Hydrogen)", "CH4 (Methane)", "C2H5OH(Ethanol) 85%", "C2H5OH(Ethanol) 75%",
                                        "C6H5NH2 (Aniline)", "NH3 (Ammonia)", "CH6N2 (MonomethylHydrazine)",
                                        "N2H4 (Hydrazine)", "CH3OH (Methanol)", "C12H24 (Kerosene)", "B2H6 (Diborane)", "B5H9 (Pentaborane)",
                                        "C2H6 (Ethane)"};
                                Collections.shuffle(Arrays.asList(fuel_List8));
                                Random fuelChosen = new Random();
                                int fuelChosen_index = fuelChosen.nextInt(fuel_List8.length);
                                fuel_Chosen = fuel_List8[fuelChosen_index];
                            } case "F2 (Fluorine)" -> {
                                String[] fuel_List9 = {"H2 (Hydrogen)", "CH4 (Methane)", "C2H5OH(Ethanol) 85%", "C2H5OH(Ethanol) 75%",
                                        "C6H5NH2 (Aniline)", "NH3 (Ammonia)",
                                        "C2H8N2 (UnsymetricalDimethylHydrazine)", "CH6N2 (MonomethylHydrazine)", "N2H4 (Hydrazine)",
                                        "CH3OH (Methanol)", "C12H24 (Kerosene)", "B2H6 (Diborane)", "B5H9 (Pentaborane)", "C2H6 (Ethane)"};
                                Collections.shuffle(Arrays.asList(fuel_List9));
                                Random fuelChosen = new Random();
                                int fuelChosen_index = fuelChosen.nextInt(fuel_List9.length);
                                fuel_Chosen = fuel_List9[fuelChosen_index];
                            } case "F2 (Fluorine) + O2 (Oxygen)", "O3 (Ozone)" -> {
                                String[] fuel_List10 = {"H2 (Hydrogen)", "CH3OH (Methanol)", "C12H24 (Kerosene)", "B2H6 (Diborane)",
                                        "B5H9 (Pentaborane)", "C2H6 (Ethane)"};
                                Collections.shuffle(Arrays.asList(fuel_List10));
                                Random fuelChosen = new Random();
                                int fuelChosen_index = fuelChosen.nextInt(fuel_List10.length);
                                fuel_Chosen = fuel_List10[fuelChosen_index];
                            } case "AK20F: 80% HNO3 + 20% N2O4 (Nitric Acid)", "AK20I: 80% HNO3 + 20% N2O4 (Nitric Acid)",
                                    "AK20K: 80% HNO3 + 20% N2O4 (Nitric Acid)", "AK27I: 73% HNO3 + 27% N2O4 (Nitric Acid)",
                                    "AK27P: 73% HNO3 + 27% N2O4 (Nitric Acid)", "ClF3 (Chlorine Trifluoride)",
                                    "ClF5 (Chlorine Pentafluoride)" -> {
                                String[] fuel_List11 = {"C2H5OH(Ethanol) 85%", "CH6N2 (MonomethylHydrazine)", "N2H4 (Hydrazine)",
                                        "CH3OH (Methanol)"};
                                Collections.shuffle(Arrays.asList(fuel_List11));
                                Random fuelChosen = new Random();
                                int fuelChosen_index = fuelChosen.nextInt(fuel_List11.length);
                                fuel_Chosen = fuel_List11[fuelChosen_index];
                            } case "N2O4 (Nitrogen Tetroxide)", "H2O2 (Hydrogen Peroxide) 95%", "H2O2 (Hydrogen Peroxide) 85%" -> {
                                String[] fuel_List12 = {"H2 (Hydrogen)", "C2H5OH(Ethanol) 85%", "C2H5OH(Ethanol) 75%",
                                        "C6H5NH2 (Aniline)", "75% CH6N2 + 25% N2H4 (UH-25)", "50% CH6N2 + 50% N2H4 (Aerosine-50)",
                                        "C2H8N2 (UnsymetricalDimethylHydrazine)", "CH6N2 (MonomethylHydrazine)", "N2H4 (Hydrazine)",
                                        "CH3OH (Methanol)", "C12H24 (Kerosene)", "C2H6 (Ethane)"};
                                Collections.shuffle(Arrays.asList(fuel_List12));
                                Random fuelChosen = new Random();
                                int fuelChosen_index = fuelChosen.nextInt(fuel_List12.length);
                                fuel_Chosen = fuel_List12[fuelChosen_index];
                            } case "N2H4 (Hydrazine)" -> {
                                String[] fuel_List13 = {"B2H6 (Diborane)", "B5H9 (Pentaborane)"};
                                Collections.shuffle(Arrays.asList(fuel_List13));
                                Random fuelChosen = new Random();
                                int fuelChosen_index = fuelChosen.nextInt(fuel_List13.length);
                                fuel_Chosen = fuel_List13[fuelChosen_index];
                            }
                        }

                        Collections.shuffle(Arrays.asList(tank_Repressurisation));
                        Random tankRepressurisationChosen = new Random();
                        int tankRepressurisationChosen_index = tankRepressurisationChosen.nextInt(tank_Repressurisation.length);
                        String tank_Repressurisation_Chosen = tank_Repressurisation[tankRepressurisationChosen_index];

                        Collections.shuffle(Arrays.asList(altitude_Of_Operation));
                        Random altitudeOfOperationChosen = new Random();
                        int altitudeOfOperationChosen_index = altitudeOfOperationChosen.nextInt(altitude_Of_Operation.length);
                        String altitude_Of_Operation_Chosen = altitude_Of_Operation[altitudeOfOperationChosen_index];

                        String nozzle_Type_Chosen = "";
                        switch (altitude_Of_Operation_Chosen) {
                            case "0-10 km (Sea Level)" -> {
                                String[] nozzle_Type_List_SL = {"De Laval Cone (Without Nozzle Extension)",
                                        "De Laval Bell (Without Nozzle Extension)"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_SL));
                                Random nozzleTypeSLspikeChosen = new Random();
                                int nozzleTypeSLspikeChosen_index = nozzleTypeSLspikeChosen.nextInt(nozzle_Type_List_SL.length);
                                nozzle_Type_Chosen = nozzle_Type_List_SL[nozzleTypeSLspikeChosen_index];
                            } case "20-30 km (Medium Atmosphere)" -> {
                                String[] nozzle_Type_List_HA = {"De Laval Bell (Without Nozzle Extension)", "De Laval Cone (With Nozzle Extension)",
                                        "De Laval Bell (With Nozzle Extension)", "Dual Bell Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_HA));
                                Random nozzleTypeHAspikeChosen = new Random();
                                int nozzleTypeHAspikeChosen_index = nozzleTypeHAspikeChosen.nextInt(nozzle_Type_List_HA.length);
                                nozzle_Type_Chosen = nozzle_Type_List_HA[nozzleTypeHAspikeChosen_index];
                            } case "30-80 km (High Atmosphere)" -> {
                                String[] nozzle_Type_List_HAi = {"De Laval Cone (With Nozzle Extension)", "De Laval Bell (With Nozzle Extension)",
                                        "Dual Bell Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_HAi));
                                Random nozzleTypeHAispikeChosen = new Random();
                                int nozzleTypeHAispikeChosen_index = nozzleTypeHAispikeChosen.nextInt(nozzle_Type_List_HAi.length);
                                nozzle_Type_Chosen = nozzle_Type_List_HAi[nozzleTypeHAispikeChosen_index];
                            } case "80 km+ (Vacuum)" -> {
                                String[] nozzle_Type_List_VA = {"De Laval Cone (With Nozzle Extension)",
                                        "De Laval Bell (With Nozzle Extension)", "Expanding Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_VA));
                                Random nozzleTypeVAspikeChosen = new Random();
                                int nozzleTypeVAspikeChosen_index = nozzleTypeVAspikeChosen.nextInt(nozzle_Type_List_VA.length);
                                nozzle_Type_Chosen = nozzle_Type_List_VA[nozzleTypeVAspikeChosen_index];
                            } case "Any Altitude (0-80 km+)" -> {
                                String[] nozzle_Type_List_Aero = {"Linear Aerospike Nozzle", "Toroidal Aerospike Nozzle", "Expansion-Deflection Nozzle"};
                                Collections.shuffle(Arrays.asList(nozzle_Type_List_Aero));
                                Random nozzleTypeAerospikeChosen = new Random();
                                int nozzleTypeAerospikeChosen_index = nozzleTypeAerospikeChosen.nextInt(nozzle_Type_List_Aero.length);
                                nozzle_Type_Chosen = nozzle_Type_List_Aero[nozzleTypeAerospikeChosen_index];
                            }
                        }
                        System.out.println(lbrk + "\n" + "Your Engine is called: " + engine_Name + "\n");
                        System.out.println("Your Engine Cycle is: " + engine_Cycle_Chosen);
                        System.out.println("Your oxidizer is: " + oxidizer_Chosen);
                        System.out.println("Your Fuel is: " + fuel_Chosen);
                        System.out.println("Your Altitude of operation is: " + altitude_Of_Operation_Chosen);
                        System.out.println("Your engine's nozzle type should be : " + nozzle_Type_Chosen);
                        System.out.println("Tank repressurisation would be done " + tank_Repressurisation_Chosen + "\n");
                        XWPFDocument docx = new XWPFDocument();
                        if (new File(String.valueOf(pathn1)).exists()) {
                            docx = new XWPFDocument(new FileInputStream(String.valueOf(pathn1)));
                        }
                        XWPFParagraph par = docx.createParagraph();
                        XWPFRun run = par.createRun();
                        run.setFontSize(12);
                        run.setBold(true);
                        run.setFontFamily("Calibri");
                        run.setText("Your Engine is called: ");
                        XWPFRun run2 = par.createRun();
                        run2.setFontSize(12);
                        run.setBold(true);
                        run2.setFontFamily("Calibri");
                        run2.setText(engine_Name);
                        run2.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run3 = par.createRun();
                        run3.setFontSize(10);
                        run3.setBold(true);
                        run3.setFontFamily("Calibri");
                        run3.setText("Your Engine Cycle is: ");
                        XWPFRun run4 = par.createRun();
                        run4.setFontSize(10);
                        run4.setFontFamily("Calibri");
                        run4.setText(engine_Cycle_Chosen);
                        run4.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run5 = par.createRun();
                        run5.setFontSize(10);
                        run5.setBold(true);
                        run5.setFontFamily("Calibri");
                        run5.setText("Your oxidizer is: ");
                        XWPFRun run6 = par.createRun();
                        run6.setFontSize(10);
                        run6.setFontFamily("Calibri");
                        run6.setText(oxidizer_Chosen);
                        run6.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run8 = par.createRun();
                        run8.setFontSize(10);
                        run8.setBold(true);
                        run8.setFontFamily("Calibri");
                        run8.setText("Your Fuel is: ");
                        XWPFRun run7 = par.createRun();
                        run7.setFontSize(10);
                        run7.setFontFamily("Calibri");
                        run7.setText(fuel_Chosen);
                        run7.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run9 = par.createRun();
                        run9.setFontSize(10);
                        run9.setBold(true);
                        run9.setFontFamily("Calibri");
                        run9.setText("Your engine's nozzle type should be: ");
                        XWPFRun run0 = par.createRun();
                        run0.setFontSize(10);
                        run0.setFontFamily("Calibri");
                        run0.setText(nozzle_Type_Chosen);
                        run0.addBreak();
                        // -----------------------------------------------------------
                        XWPFRun run11 = par.createRun();
                        run11.setFontSize(10);
                        run11.setBold(true);
                        run11.setFontFamily("Calibri");
                        run11.setText("Tank repressurisation would be done ");
                        XWPFRun run12 = par.createRun();
                        run12.setFontSize(10);
                        run12.setBold(true);
                        run12.setFontFamily("Calibri");
                        run12.setText(tank_Repressurisation_Chosen);
                        run12.addBreak();
                        // -----------------------------------------------------------
                        try (FileOutputStream out = new FileOutputStream(String.valueOf(pathn1))) {
                            docx.write(out);
                        }
                    }
                }
            } else {
                while (!(repeatCommand.equalsIgnoreCase("Y") && repeatCommand.equalsIgnoreCase("N"))) {
                    System.out.println("wrong input!");
                    System.out.print("> ");
                    repeatCommand = scanner.next();
                    repeatCommand = repeatCommand.toUpperCase();
                    if (repeatCommand.equals("Y") || repeatCommand.equals("N")) {
                        break;
                    }
                }
            }
        }
    }
}