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

#define REP(i,n)  for(int i=0;i<(int)n;++i)
#define PRI(n) cout << n << "\n";


string subno18(string s){
    char c;
    int  n;
    string t("", s.size());
    REP(i, s.size()){
        c = s[i];
        n = i;
        while (n >= 0){
            c--;
            if (c == 'A' - 1){
                c = 'Z';
            }
            n--;
        }
        t[i] = c;
    }
    return t;
}

void no18(){
    string s, t;
    cin >> s;
    t = subno18(s);
    PRI(t)
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    no18();
}