#include <iostream>

using namespace std;

const int n = 80;

void f(char c, int a) {
	for (int i = 0; i < a; ++i) {
		cout << "*";
	}
	for (int i = 0; i < n - 2 * a; ++i) {
		cout << c;
	}
	for (int i = 0; i < a; ++i) {
		cout << "*";
	}
	cout << endl;
	if (c == 'Z') {
		return;
	}
	f(++c, ++a);
	for (int i = 0; i < a - 1; ++i) {
		cout << "*";
	}
	for (int i = 0; i < n - 2 * (a - 1); ++i) {
		cout << (char) (c - 1);
	}
	for (int i = 0; i < a - 1; ++i) {
		cout << "*";
	}
	cout << endl;
}

int main() {
	int a = 0;
	char c = 'A';
	f(c, a);
	cout << endl;
}