WuddleCahes C#

        public static string WuddleCahes(string input)
        {
            int i = 42;
            int j = input.Length - 4;
            char[] chars = new char[j];

            for (int k = 0; k < j; k++)
            {
                int m = input[k + 4];
                if (m > 31 && m < 127)
                {
                    char tmp = ((char)((i + input[k] + m) % 95 + 32));
                    i = tmp;
                    chars[k] = tmp;
                }
                else
                {
                    chars[k] = (char)m;
                }
            }

            return new string(chars);
        }