02. Message Encrypter

using System;
using System.Text.RegularExpressions;

namespace _02._Program
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());

            var regex = @"([@*])(?<command>[A-Z]{1,1}[a-z]{2,})(\1): \[(?<firstGroup>[A-Za-z])\]\|\[(?<secondGroup>[A-Za-z])\]\|\[(?<thirdGroup>[A-Za-z])\]\|$";
            for (int i = 0; i < n; i++)
            {
                string message = Console.ReadLine();
                Match m = Regex.Match(message, regex);

                if (m.Success)
                {
                    string command = m.Groups["command"].Value;
                    var firstGroup = Convert.ToChar(m.Groups["firstGroup"].Value);
                    var secondGroup = Convert.ToChar(m.Groups["secondGroup"].Value);
                    var thirdGroup = Convert.ToChar(m.Groups["thirdGroup"].Value);
                    Console.WriteLine($"{command}: {(int)firstGroup} {(int)secondGroup} {(int)thirdGroup}");
                }
                else
                {
                    Console.WriteLine($"Valid message not found!");
                }
            }
        }
    }
}