01. Final

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace solutions
{
    class one
    {
        static void Main()
        {
            var patern = @"^(?<peak>[A-Za-z0-9!@#$?]+)=(?<length>\d+)<<(?<code>.+)$";

            while (true)
            {
                var input = Console.ReadLine();

                if (input == "Last note")
                {
                    break;
                }
                else
                {
                    if (Regex.Match(input, patern).Success)
                    {
                        foreach (Match item in Regex.Matches(input, patern))
                        {
                            var name = "";
                            var length = int.Parse(item.Groups["length"].Value);
                            var code = item.Groups["code"].Value;
                            if (length == code.Length)
                            {
                                foreach (var m in item.Groups["peak"].Value)
                                {
                                    if (char.IsLetterOrDigit(m))
                                    {
                                        name += m;
                                    }
                                }
                                Console.WriteLine($"Coordinates found! {name} -> {code}");
                            }
                            else
                            {
                                Console.WriteLine("Nothing found!");
                            }
                        }
                    }
                    else
                    {
                        Console.WriteLine("Nothing found!");
                    }
                }
            }
        }
    }
}