#include <bits/stdc++.h>
using namespace std;
int main () {
    int N;
    cin >> N;
    string key = "abcdefghijklmnopqrstuvwxyz";
    for (int i = 0; i < N; i ++) {
        char c;
        cin >> c;
        cout << key[25 - c + 'a'];
    }
    cout << endl;
}