using System;
using System.Diagnostics;
using System.IO;
using System.Security.Cryptography;
using System.Text;

namespace ndh_stay_alive {
    public class Program {
        public static string sTrustedPassword = "+5jeyeCv5uejnwa2dd5L7LvIjM4nDFyhhLY+Nj5Rh3wgZFL8Mi3hltRicAalWPuLRQMk91oag4dfWfnj7nD3JB13grBCyFMf6pJwP8bfBQ5+R2kbpJn0tqCMmUNZzFwQFMU+EW0/Nkoup5Zl4hxoPFRfmk1fhKJhfBkdhNYiDqt23jbRoxDbO3QHpy6M2kY/8hd3Z1ds8a1StSQkXxNyjZd2mTQPpTR4zmyf9FzK4Y4XUfzw1hUP3qj+dGyKgNjQmXdtPTOqRVh2T41NSvmK/YV6XzIk6SFdhF9XyXUJOlcII5mXQ/SuHiHmkEoTJiUF3XGN/LkjnNy6pRzZH6s2YC27g7sqqFj71xPY+S3KHLy1y/PwJtz1E7EBzqaXxTxDOE9wiPArIoY9Rl//8RalprwBKeEzZajgbqFz5sEkV6hplGCkiua1FfPXht9Ef8br";

        public static void Main(string[] args) {
            login(Console.ReadLine());
        }

        public static void login(string sPassword) {
            string sCrypted = null;
			
            if (sPassword.Length > 0) {
                sCrypted = cryptPassword(sPassword);
				
                if (sCrypted == sTrustedPassword) {
                    Console.WriteLine("Done!");
                }
				
                Console.WriteLine("Failed!");
            }
        }
		
        public static string cryptPassword(string password) {
            string key   = "AYOOYOYOAYOOYOYO";
            string salt  = "WOLOLOWOLOLOOOO";
            string text  = "ndh2k12!";
            string key2  = null;
            string text2 = null;
			
            for (int i = 0; i < password.Length; i++) {
                string text3 = password[i].ToString();
                string text4 = null;
				
                if (i % 2 == 0) {
                    text4 = base64Encode(text + text3);
                }
                else {
                    text4 = aesEncode(text3, key2, text);
                }
				
                text2 += text4;
                key2   = text4;
            }
			
            text2 = aesEncode(text2, key, salt);
			
            return text2;
        }
		
        public static string base64Encode(string data) {
            byte[] inArray = Encoding.UTF8.GetBytes(data);
			
            return Convert.ToBase64String(inArray);
        }
		
        public static string aesEncode(string data, string key, string salt) {
            byte[]             salt2              = Encoding.UTF8.GetBytes(salt);
            Aes                aes                = new AesManaged();
            Rfc2898DeriveBytes rfc2898DeriveBytes = new Rfc2898DeriveBytes(key, salt2);
			
            aes.Key = rfc2898DeriveBytes.GetBytes(16);
            aes.IV  = aes.Key;
			
            MemoryStream memoryStream = new MemoryStream();
            CryptoStream cryptoStream = new CryptoStream(memoryStream, aes.CreateEncryptor(), CryptoStreamMode.Write);
            byte[]       bytes        = Encoding.UTF8.GetBytes(data);
			
            cryptoStream.Write(bytes, 0, bytes.Length);
            cryptoStream.FlushFinalBlock();
			
            return Convert.ToBase64String(memoryStream.ToArray());
        }
    }
}