using System;
public class Hello{
    static string Decode(string input){
        string sample = "ZYXWVUTSRQPONMLKJIHGFEDCBA";
        string ans = "";
        for(int x = 0;x < input.Length;x++){
            for(int y = 0;y < sample.Length;y++){
                if(input.Substring(x,1) == sample.Substring(y,1)){
                   ans += sample.Substring((y + x + 1) % 26,1);
                }
            }
        }
        return ans;
    }
    public static void Main(){
        string X = Console.ReadLine();
        string Ans = Decode(X);
        Console.WriteLine(Ans);
        
    }
}