using System;
public class Program
{
    static void Main()
    {
        string us = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        string s = Console.ReadLine();
        for (int i = 0; i < s.Length; i++)
        {
            string temp = s.Substring(i, 1);
            int num = us.IndexOf(temp, 0);
            num = num - (i+1);
            while(num<0)
            {
                num = 26 + num;
            }
            temp = us.Substring(num, 1);
            Console.Write(temp);
        }
        Console.Write("\n");
    }
}