#include <iostream>
#include <math.h>
#include <algorithm>
#include <functional>
#include <vector>
#include <typeinfo>
#include <climits>
#include <ctype.h>
#include <string>
using namespace std;
#define INIT cin.tie(0); ios::sync_with_stdio(false);
#define FOR(i, a, n) for (int i = a; i < n; i++)
#define REP(i, n) for(int i = 0; i < n; i++)

int main()
{
    INIT;

    string s;
    cin >> s;

    char A[26];
    REP(i, 26) A[i] = 'A' + i;

    int c = 0;
    REP(i, s.size()){
        REP(j, 26){
            if(s[i] == A[j]){
                c = j;
                break;
            }
        }
        if(c - (i + 1) < 0){
                s[i] = A[26 - ((i + 1) - c)];
        }else{
                s[i] = A[c - (i + 1)];
        }
        c = 0;
    }
    cout << s << endl;


    return 0;
}