#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,m,n) for(int i=m; i<n; ++i)
#define repl(i,m,n) for(ll i=m; i<n; ++i)

int main(){
    int N;
    string S;
    cin >> N >> S;

    map<char, char> conv;
    rep(i, 0, 26){
        char od = 'a' + i;
        char nw = 'z' - i;
        conv[od] = nw;
    }

    for(char &s : S) cout << conv[s];
    cout << endl;

    return 0;
}