encrypt

package com.Olympiad2016;

import java.util.ArrayList;
import java.util.Scanner;

public class t {
    public static void main(String[] args) {
        Scanner console = new Scanner(System.in);

        while (true) {
            String inputStart = console.nextLine();

            if (inputStart.equals("START") || inputStart.equals("start")) {
                break;
            }
        }

        int messageCount = 0;

        ArrayList<String> output = new ArrayList<>();
        StringBuilder encryptedMessage = new StringBuilder();

        while (true) {

            String input = console.nextLine();
            if (input.equals("END") || input.equals("end")) {
                break;
            }

            if (input.equals("")) {
                continue;
            }
            messageCount++;
            for (char ch : input.toCharArray()) {
                // For the digits 0 -> 1
                if (ch >= 48 && ch <= 57) {
                    encryptedMessage.append(ch);
                    // For upperCase letters A -> M
                } else if (ch >= 65 && ch <= 77) {
                    encryptedMessage.append((char) (ch + 13));
                    // For lowerCase letters a -> m
                } else if (ch >= 97 && ch <= 109) {
                    encryptedMessage.append((char) (ch + 13));
                    // For upperCase letters N -> Z
                } else if (ch >= 78 && ch <= 90) {
                    encryptedMessage.append((char) (ch - 13));
                    // For lowerCase letters n -> a
                } else if (ch >= 110 && ch <= 122) {
                    encryptedMessage.append((char) (ch - 13));
                    // For the special characters
                } else if (ch == 32) {
                    encryptedMessage.append((char) 43);
                } else if (ch == 44) {
                    encryptedMessage.append((char) 37);
                } else if (ch == 46) {
                    encryptedMessage.append((char) 38);
                } else if (ch == 63) {
                    encryptedMessage.append((char) 35);
                } else if (ch == 33) {
                    encryptedMessage.append((char) 36);
                } else if (ch == 43) {
                    encryptedMessage.append((char) 32);
                } else if (ch == 37) {
                    encryptedMessage.append((char) 44);
                } else if (ch == 38) {
                    encryptedMessage.append((char) 46);
                } else if (ch == 35) {
                    encryptedMessage.append((char) 63);
                } else if (ch == 36) {
                    encryptedMessage.append((char) 33);
                }
            }
            output.add(encryptedMessage.reverse().toString());
            //clear the stringBuilder for the next message
            encryptedMessage.setLength(0);
        }
        if (messageCount == 0) {
            System.out.println("No messages sent.");
        } else {
            System.out.println("Total number of messages: " + messageCount);
        }

        for (String string : output) {
            System.out.println(string);
        }
    }
}