08.Anonymous Threat

import java.util.Arrays;
import java.util.List;
import java.util.Scanner;
import java.util.stream.Collectors;

public class Demo {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        List<String> input = Arrays.stream(scanner.nextLine().split(" ")).collect(Collectors.toList());
        String command = scanner.nextLine();
        while (!command.equals("3:1")) {
            String[] commandParts = command.split(" ");
            if (commandParts[0].equals("merge")) {
                mergeMethod(input, commandParts[1], commandParts[2]);
            } else if (commandParts[0].equals("divide")) {
                divideMethod(input, commandParts[1], commandParts[2]);
            }
            command = scanner.nextLine();
        }
        for (String text : input) {
            System.out.print(text + " ");
        }

    }

    private static void divideMethod(List<String> input, String commandPart, String commandPart1) {

        int index = Integer.parseInt(commandPart);
        int parts = Integer.parseInt(commandPart1);

        if (index >= 0 && index <= input.size() - 1) {

            String textToDivide = input.get(index);
            input.remove(index);

            int symbolsCount = textToDivide.length() / parts;

            int startIndex = 0;
            for (int part = 1; part < parts; part++) {
                String textPerPart = textToDivide.substring(startIndex, startIndex + symbolsCount);
                input.add(index, textPerPart);
                index++;
                startIndex += symbolsCount;
            }

            String textLastParts = textToDivide.substring(startIndex, textToDivide.length());
            input.add(index, textLastParts);


        }
    }

        private static void mergeMethod (List < String > input, String start, String end){
            int starts = Integer.parseInt(start);
            int ends = Integer.parseInt(end);

            if (starts < 0) {
                starts = 0;
            }
            if (ends > input.size() - 1) {
                ends = input.size() - 1;
            }

            if (starts >= 0 && starts <= input.size() - 1 && ends >= 0 && ends <= input.size() - 1) {
                String merge = "";
                for (int i = starts; i <= ends; i++) {
                    merge += input.get(i);

                }

                for (int index = starts; index <= ends; index++) {
                    input.remove(starts);
                }


                input.add(starts, merge);
            }


        }
    }