#include <bits/stdc++.h>
using namespace std; 
int n;
int main() {
    cin >> n;
    for (int i = 1; i <= n; i++) { 
        for (int j = 1; j <= n; j++) { 
            cout << (char)((i + j) % 26 + 'A'); 
        }
        cout <<endl;
    }
    return 0;
}