#include <bits/stdc++.h>
#include <vector>
#include <iostream>
#include <map>
#include <string>
#include <cmath>
#include <algorithm>
#include <queue>
#include <math.h>
#include <ctype.h>
#include <numeric>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repe(i,x,n) for(int i=x; i<(n); ++i)
#define pie 3.1415926535897932384
#define INF 10010010000
#define _GLIBCXX_DEBUG
#define All(a) (a).begin(),(a).end()
#define rAll(a) (a).rbegin(),(a).rend()
#define pb push_back
#define mk make_pair
#define yes cout << "Yes" << endl;
#define no cout << "No" << endl;
#define decimal cout << fixed << setprecision(20);
#define nextP next_permutation
#define em emplace_back
using ll = long long;
using P = pair<int, int>;
const ll MOD = 1000000007;
const ll INF1 = 1e18;
const ll mod = 998244353;

int main() {

    int n;
    cin >> n;
    string s;
    cin >> s;
    for(int i=0; i<n; i++) {
        int n = 122 - int(s[i]) + 97;
        cout << char(n);
    }
    cout << endl;
    return 0;

}