#include <stdio.h>

int main()
{
    int n = 0;
    while (scanf("%d", &n) != EOF)
    {
        for (int i = 0; i < n; i++) 
        {
            for (int j = 0; j < n; j++) 
            {
                if (i == 0)
                {
                    printf("* ");
                }
                else if (i == n - 1)
                {
                    printf("* ");
                }
                else if (j == 0)
                {
                    printf("* ");
                }
                else if (j == n - 1)
                {
                    printf("* ");
                }
                else
                    printf("  ");
            }
            printf("\n");
        }
    }
}