02. Message Decrypter

package ZadachiOtIzpita;

import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

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


        int n = Integer.parseInt(scanner.nextLine());

        for (int i = 0; i < n; i++) {
            String input = scanner.nextLine();
            String decryptedMessage = validateAndDecrypt(input);
            System.out.println(decryptedMessage);
        }
    }

    public static String validateAndDecrypt(String input) {
        String regex = "(?:\\$([A-Z][a-z]{2,})\\$|%([A-Z][a-z]{2,})%): \\[(\\d+)\\]\\|\\[(\\d+)\\]\\|\\[(\\d+)\\]\\|";
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(input);

        if (matcher.matches()) {
            String tag = matcher.group(1) != null ? matcher.group(1) : matcher.group(2);
            int num1 = Integer.parseInt(matcher.group(3));
            int num2 = Integer.parseInt(matcher.group(4));
            int num3 = Integer.parseInt(matcher.group(5));

            char char1 = (char) num1;
            char char2 = (char) num2;
            char char3 = (char) num3;

            String decryptedMessage = String.valueOf(char1) + String.valueOf(char2) + String.valueOf(char3);

            return tag + ": " + decryptedMessage;
        } else {
            return "Valid message not found!";
        }
    }
}