Exam\The Isle of Man TT Race 01

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Text.RegularExpressions;


namespace Orders
{
    class Program
    {
        static void Main(string[] args)
        {
            bool coordinatesFound = false;

            while (!coordinatesFound)
            {
                string input = Console.ReadLine();

                string lengthPattern = @"=(\d+)!!";

                Match number = Regex.Match(input, lengthPattern);
                if (number.Success)
                {
                    int length = int.Parse(number.Groups[1].Value);

                    string pattern = $@"([#$%*&])(\w+)\1=(\d+)!!(.{{{length}}})$";

                    Match match = Regex.Match(input, pattern);

                    if (match.Success)
                    {
                        coordinatesFound = true;
                        string name = match.Groups[2].Value;
                        string coord = match.Groups[4].Value;
                        StringBuilder sb = new StringBuilder();

                        for (int i = 0; i < coord.Length; i++)
                        {
                            sb.Append((char)(coord[i] + coord.Length));
                        }

                        Console.WriteLine($"Coordinates found! {name} -> {sb}");
                        break;
                    }
                    //Console.WriteLine(length);
                }
                Console.WriteLine("Nothing found!");
            }

        }
    }
}