#include <bits/stdc++.h>
using namespace std;
using ll=long long;
using ld=long double;
using P=pair<ll,ll>;
using V=vector<ll>;
#define rep(i,n) for(int i=0;i<n;i++)
#define REP(i,n) for(ll i=1;i<=n;i++)

int main(){
    int n;
    string s;
    cin >> n >> s;
    rep(i,n) s[i]='a'+'z'-s[i];
    cout << s << endl;
}