#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using Graph = vector<vector<int>>;
long long GCD(long long a,long long b) {
  if(a%b == 0) return b;
  return GCD(b,a%b);
}
int main() {
  long long N; cin >> N;
  string S; cin >> S;
  string ans = "";
  string alpha = "abcdefghijklmnopqrstuvwxyz";
  for(long long i = 0; i < N; i++) {
    int x  =0;
    for(int j = 0; j < 26; j++) {
      if(S[i] == alpha[j]) {
        x = j;
      }
    }
    ans += alpha[25 - x];
  }
  cout << ans << endl;
}