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

void fast_io() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}

int main() {
    fast_io();
    int n;
    cin >> n;
    string s;
    cin >> s;
    for (char c : s) {
        cout << (char)((25 - (c - 'a')) + 'a');
    }
    cout << endl;
}