using System;
using System.Text;
 
class Untitled
{
	static void Main(string[] args)
			{
				string key = "rVOlpZOlp6RUa2RhY11UpKeUlZalpFRrpqOnll5TlpKmklRrrVOempWQm5VUa2NdVJKnpZqgpFNsU4FYnaWTnlKKk6Knk6GnVF1UoKSYk5+bq5Olm6CgkKCSn5ZUa1R+e35ziVKEgXeGiHODd1F5g4GGglNeU6GjmZKgmqySppqhn5GWn5KbnVRrVKSnoaKgpKVynpuek6mZo6Gmol+VoJ9TXlOho5mSoJqskqaaoZ+RoZqgoJZUa1SFk6SanJefplF1mqaqVF1UnZuUkZaqoZujl5VUa1RjYmNnXmNiX2NkUWJhbGFia2JhVF1UnZuUl5+llpGUpJaTpZeVVGtUY2JjZF5iYl9iZFNeU56alZagpJeQl6mimqSWllNsU2RhZGZfYmNeZGNUXVSVl6eblJeQnpqfmqZTbGJirl5Tn5alpJOYl1NsU4ugp6NSnZuUl5+lllKcl6pSkpWlm6eTpZeVVK4=";
				Console.WriteLine(DecryptIt(key));
			}
 
			static string DecryptIt (string key)
			{
				/// <summary> 
				/// Decrypt key using custom algarithm
				/// </summary>
				///
				byte[] data = Convert.FromBase64String(key);
				byte[] keyLength = new byte[] {0x31, 0x32};
				byte[] result = new byte[data.Length];
				for (int i = 0; i < data.Length; i++)
				{
					int res = (i % keyLength.Length) - 1;
					int res2 = res < 0 ? keyLength.Length + res : res;
					//Console.WriteLine(res2.ToString());
					//Console.WriteLine(key.Length);
					byte ch = data[i];
					byte KeyChar = keyLength[res2];
					ch = (byte)(ch - KeyChar);
					result[i] = ch;
				}
				return Encoding.UTF8.GetString(result);
			}
}

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