#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;

int N;
string S;

int main() {
  cin >> N >> S;
  for (int i = 0; i < N; i++) {
    cout << char('z' - (S[i] - 'a'));
  }
  cout << endl;
  return 0;
}