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