#include <iostream>
#include <vector>
#include <string>
#include <cstring>
#include <math.h>
#include <cmath>
#include <limits.h>
#include <map>
#include <set>
#include <queue>
#include <algorithm>
#include <functional>
#include <stdio.h>
using namespace std;

long long MOD = 1000000007;

int main() {
    
    string ans;
    string S;
    cin >> S;
    for ( int i = 0; i < S.length(); i++ ) {
        
        char c = S[i];
        
        c = 'A' + ( c-'A' + 26-( (i+1)%26) )%26;
        
        ans.push_back(c);
        
    }
    
    cout << ans << endl;
    
    return 0;
}