Final Exam/Arriving in Kathmandu

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

namespace fundamental14
{
    class MainClass
    {
        public static void Main()
        {
            string input = string.Empty;
            string pattern = @"^([A-Za-z0-9\!\@\#\$\?]+)=(\d+)<<([A-Za-z0-9]+)$";

            while ((input = Console.ReadLine()) != "Last note")
            {
                Match match = Regex.Match(input, pattern);

                if (match.Success)
                {
                    string name = match.Groups[1].Value;
                    int lenght = int.Parse(match.Groups[2].Value);
                    string geohasCode = match.Groups[3].Value;

                    if (lenght == geohasCode.Length)
                    {
                        var nameOfMountain = new String(name.Where(Char.IsLetterOrDigit).ToArray());

                        Console.WriteLine($"Coordinates found! {nameOfMountain} -> {geohasCode}");
                    }
                    else
                    {
                        Console.WriteLine("Nothing found!");
                    }
                }
                else
                {
                    Console.WriteLine("Nothing found!");
                }
            }
        }
    }
}