#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using ll = long long;
using vi = vector<int>;
using vvi = vector<vector<int>>;
using pii = pair<int, int>;
#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
#define repr(i, n) for (int i = (int)(n - 1); i >= 0; --i)

int main() {
    int n;
    cin >> n;
    string ret;
    cin >> ret;
    rep(i, n) {
        int c = ret[i] - 'a';
        ret[i] = (char)('a' + 25 - c);
    }
    cout << ret << endl;
    return 0;
}