#include <iostream>

using namespace std;

int main()
{
	int n; cin >> n;
	int a=0; 
	while (a < n)
	{
		cout << "*";
		a++;
		
	}
	cout <<"\n";

	int i = 0;
	while (i < n-2)
	{
		a = 1;
		while (a <= n)
		{
			if (a == 1 || a == n || a== i+2)
			{
				cout << "*";
			}
			else 
			{
				cout <<" ";
			}
			a++;
		}
		cout <<"\n";
		i++;
	}

	a = 0;
	while (a < n)
	{
		cout << "*";
		a++;
		
	}
	return 0;
}