#include <iostream>
#include <cmath>
using namespace std;

int main()
{
    int n;
    cin >> n;
    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= n; j++)
        {
            if (j == 1 || j == n || i == j || i == 1 || i == n || i + j == n + 1)
            {
                cout << "*";
            }
            else
                cout << " ";
        }
        cout << "\n";
    }

    return 0;
}