#include <iostream> #include <algorithm> #include <vector> #include <string> #include <map> #include <set> #include <fstream> #include <cmath> #include <stack> #include <queue> #include <iomanip> using namespace std; int main(){ int n;cin>>n; string s;cin >> s; for(int i=0;i<n;i++) cout << char('z' + ('a' - s[i])); cout << endl; }