02. Match Phone Number

package regularExpressions;

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

public class P02MatchPhoneNumber {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String input = scanner.nextLine();

        String regex = "\\+359([ -])2\\1\\d{3}\\1\\d{4}\\b";
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(input);

        List<String> numbersList = new ArrayList<>();
        while (matcher.find()) {
            String validPhoneNumber = matcher.group();

            numbersList.add(validPhoneNumber);
        }

        System.out.println(String.join(", ", numbersList));

    }
}