#include <iostream>
using namespace std;
int main() {
    int n;
    cin >> n;
    
    for (int i = 1; i <= n+1; i++) {
        for (int j = 1; j <= i-1; j++) {
            cout << ' ';
        }
        for (int j = 1; j <= (2*n+1)-2*(i-1); j++) {
            cout << "A";
        }
        cout << endl;
	}
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= n - i; j++) {
            cout << ' ';
        }
        for (int j = 1; j <= 2*i+1; j++) {
    		cout << "A";
		}
        cout << endl;
	}
    return 0;
}