#include <bits/stdc++.h>
#include <string>
using namespace std;
int main()
{
    string s;
    char c;
    int n;
    cin >> s;
    for (int i = 0; i < s.size(); i++) {
        c = s[i];
        n = i;
        while (n >= 0) {
            c--;
            if (c == 'A'-1) {
                c = 'Z';
            }
            n--;
        }
        s[i] = c;
    }
    cout << s << endl;
    return 0;
}