#include <iostream>
#include <string>
using namespace std;
 
int main() {
	long long n;
	string s1 = "", s2 = "";
	cin >> n;
	for (int i = 0; i < n; i++){//заполняем строки 
		if (i % 2 == 0){
			s1 += "*";
			s2 += " ";
		}
		else {
			s2 += "*";
			s1 += " ";
		}
	}
	for (int i = 0; i < n; i++){
		if (i % 2 == 0){//выводим s1, если строка имеет четный номер
			cout << s1 << endl;
		}
		else cout << s2 << endl;//выводим s2, если строка имеет нечетный номер
	}
	return 0;
}

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3