#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int main() {
  string s;
  cin >> s;
  for (int i=0; i<s.size(); i++) {
    int t=i%26;
    int n=s[i]-t;
    while (n<66) {
      n+=26;
    }
    printf("%c", n-1);
  }
  cout << endl;
  return 0;
}