#include <bits/stdc++.h>
#include<iostream>
#include<map>
#include<vector>
#include <algorithm>
#include<math.h>
#include <iomanip>
#include<set>
#include <numeric>
#include<string>
using ll = long long;
using namespace std;

int main()
{
    ll n, t;
    string s;
    cin >> n >> s;
    for (int i = 0; i < n; i++){
        t = s[i] - 'a';
        cout << (char)('z' - t);
    }
    cout << endl;
}