using System;
using System.Text.RegularExpressions;

namespace SongEncryption
{
    class Program
    {
        static void Main(string[] args)
        {
            //string pattern = @"(^[A-Z]{1}[a-z]+[\s|'a-z]*):([A-Z\s*]+\b)";
            string pattern = @"^([A-Z]{1}[a-z\' ]+):([A-Z ]+)\b";
            string input = Console.ReadLine();
            string result = string.Empty;


            while (input != "end")
            {
                Match singerAndSong = Regex.Match(input, pattern);

                if (singerAndSong.Success)
                {
                    int key = singerAndSong.Groups["1"].Value.Length;
                    string song = singerAndSong.Groups["2"].Value;
                    input = input.Replace(":", "@");
                    for (int i = 0; i < input.Length; i++)
                    {
                        char currentChar = input[i];
                        if (currentChar != ' ' && currentChar.ToString() != "'" && currentChar != '@')
                        {
                            for (int j = 0; j < key; j++)
                            {

                                currentChar++;
                                if (currentChar == 'z' && j+1 != key)
                                {
                                    currentChar = 'a';
                                    j++;
                                }
                                if (currentChar == 'Z' && j+1 != key)
                                {
                                    currentChar = 'A';
                                    j++;
                                }
                            }
                        }
                        result += currentChar;

                    }
                    Console.WriteLine($"Successful encryption: {result}");
                    result = string.Empty;
                }
                else
                {
                    Console.WriteLine("Invalid input!");
                }



                input = Console.ReadLine();
            }

        }
    }
}