#include<iostream>
using namespace std;
int main()
{
	int n;
	cin >> n;
	for (int i = 1;i <= n;i++)
	{
		for (int j = 1;j <= n;j++)
		{
			if (i == 1 || i == n || j == 1 || j == n || i == j || j == n - i + 1)
			{
				cout << "*";
			}
			else
			{
				cout << " ";
			}
		}
		cout << endl;
	}
	
	return 0;
}