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

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n; cin >> n;
    string s; cin >> s;
    for (char &c : s) {
        c = 'a' + 'z' - c;
    }
    cout << s;
}