Message Decrypter - Groups, quantifiers, int to char to str

package com.company;

import javafx.util.Pair;

import javax.xml.crypto.dsig.keyinfo.KeyValue;
import java.lang.reflect.Array;
import java.security.KeyStore;
import java.text.Collator;
import java.text.DecimalFormat;
import java.util.*;
import java.util.function.Predicate;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collector;
import java.util.stream.Collectors;


public class Main {



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

        final String REGEX = "^(\\$|\\%)(?<tag>[A-Z][a-z]{3,})\\1: \\[(?<first>[0-9]+)\\]\\|\\[(?<second>[0-9]+)\\]\\|\\[(?<third>[0-9]+)\\]\\|$";
        Pattern pattern = Pattern.compile(REGEX);

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

        for (int i = 0; i < n; i++) {
            String input = scanner.nextLine();
            Matcher matcher = pattern.matcher(input);

            if (matcher.find()) {
                String tag = matcher.group("tag");
                int first = Integer.parseInt(matcher.group("first"));
                int second = Integer.parseInt(matcher.group("second"));
                int third = Integer.parseInt(matcher.group("third"));

                String firstDecrypted = (char) first + "";
                String secondDecrypted = (char) second + "";
                String thirdDecrypted = (char) third + "";

                System.out.println(tag + ": " + firstDecrypted + secondDecrypted + thirdDecrypted);
            }else{
                System.out.println("Valid message not found!");
            }
        }

    }
}