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

int main() {
    ll n;
    cin >> n;
    string s;
    cin >> s;
    rep(i, n) { s[i] = 'z' - (s[i] - 'a'); }
    cout << s << endl;
}