#include <bits/stdc++.h>
using namespace std;

int ctoi(char c){
    switch(c){
        case '1': return 1;
        case '2': return 2;
        case '3': return 3;
        case '4': return 4;
        case '5': return 5;
        case '6': return 6;
        case '7': return 7;
        case '8': return 8;
        case '9': return 9;
        default: return 0;
    }
}

int main() {
    int n;
    string s;
    cin >> n >> s;
    vector<char> alphabet = {'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};;

    for(int i = 0; i < n; i++){
        for(int j = 0; j < 26; j++){
            if(s.at(i) == alphabet[j]) {
                cout << alphabet[alphabet.size() - j - 1];
                break;
            }
        }
    }
    cout << endl;
}