#include <bits/stdc++.h>

using namespace std;

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

    int N;
    string S;
    cin >> N >> S;
    (void)N;

    for (char &c : S)
    {
        c = (char)('a' + 'z' - c);
    }

    cout << S << endl;
}