using System;
using System.Linq;
using System.Collections.Generic;

public class P0018 {
    public static void Main() {
        char[] s = Console.ReadLine().Trim().ToCharArray();
        char[] alphabets = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".ToCharArray();
        Dictionary<char, int> alphabet2num = Enumerable.Range(0, alphabets.Length).ToDictionary(i => alphabets[i], i => i);
        var result = String.Join(
              ""
            , Enumerable.Range(0, s.Length)
                .Select(i => alphabet2num.GetValueOrDefault(s[i]) - i - 1)
                .Select(i => i % alphabets.Length)
                .Select(i => i + alphabets.Length)
                .Select(i => i % alphabets.Length)
                .Select(i => alphabets[i])
        );
        Console.WriteLine(result);
    }
}