using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

class Magatro
{
    static Dictionary<char, int> D = new Dictionary<char, int>();
    static void Main()
    {
        string s = Console.ReadLine();
        
        string ABC = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        char[] C = ABC.ToArray();
        for (int i = 0; i < 26; i++)
        {
            D.Add(ABC[i], i);
        }
        int lng = s.Length;
        for(int i = 0; i < lng; i++)
        {
            int r = (1300 - i-1 + D[s[i]]) % 26;

            Console.Write(C[r]);
        }
        Console.WriteLine();
    }
}