using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Deciphering
{
    class Program
    {
        public static void Main()
        {
            var book = Console.ReadLine();
            var bookPattern = @"^[d-z{}|#]+$";
            var bookMatch = Regex.Match(book, bookPattern);

            if (bookMatch.Success)
            {
                var validBook = bookMatch.ToString();
                var decriptedStr = string.Empty;

                for (int i = 0; i < validBook.Length; i++)
                {
                    var currentlater = validBook[i];
                    int asciiCode = currentlater - 3;
                    var newLetter = (char)asciiCode;
                    decriptedStr += newLetter;
                }

                var substrings = Console.ReadLine()
                    .Split();
                var finalString = decriptedStr.Replace(substrings[0], substrings[1]);

                Console.WriteLine(finalString);
            }
            else
            {
                Console.WriteLine("This is not the book you are looking for.");
            }
        }
    }
}