#include <iostream>
using namespace std;
 
int main() {
    int n;
    cin >> n;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= n - i; j++) {
            cout << " ";
        }
        for (int k = 1; k <= 2 * i - 1; k++) {
            cout << char('A' + i - 1);
        }
        cout << endl;
    }
    return 0;
}    
/**************************************************************
	Problem: 1094
	User: wengzihang
	Language: C++
	Result: Accepted
	Time:12 ms
	Memory:2072 kb
****************************************************************/