#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;

int main() {
  string M = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
  string S; cin >> S;
  for(int i = 0; i < (int)S.size(); i++){
    int j = M.find(S[i]);
    cout << M[(j-i+2599)%26];
  }
  cout << endl;
}