#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < n; ++i)
typedef long long ll;
using namespace std;

int main() {
    cin.tie(0);
    ios_base::sync_with_stdio(false);

    int N;
    string S;
    cin >> N >> S;

    rep(i, N) {
        S[i] = 'z' - (S[i] - 'a');
    }
    cout << S << "\n";

    return 0;
}