#include <iostream>

using namespace std;
int count = 1;
string fact(int num, string o="*"){
	if(count == num) return o;
	if(num <= 1){
		return o;
	}else{
		string ret;
		for(int i=0; i<count+1; i++){
			ret += "*";
		}
		count++;
		return fact(num, o + "\n" + ret + "\n" + o);
	}
}

int main() {
	cout << fact(4);
	return 0;
}