Melrah Shake

        string input = Console.ReadLine();
        string pattern = Console.ReadLine();
        while (pattern.Length > 0)
        {
            int firstIndex = input.IndexOf(pattern);
            int lastIndex = input.LastIndexOf(pattern);

            if (firstIndex != lastIndex)
            {
                input = input.Remove(lastIndex, pattern.Length);

                input = input.Remove(firstIndex, pattern.Length);

                pattern = pattern.Remove(pattern.Length / 2, 1);

                Console.WriteLine("Shaked it.");
            }

            else
            {
                break;
            }

        }

        Console.WriteLine("No shake.");
        Console.WriteLine(input);