#include<stdio.h>
int n;
void draw(int n)
{
	int i,j;
	for (i=1-(n>>1); i<=n; i++)
		if (i>0)
		{
			for (j=0; j<i; j++) printf(" ");
			for (j=1; j<=2*(n-i)+1; j++)
				if (j==1||j==2*(n-i)+1) printf(" *");
				else printf(" ");
			printf("\n");
		}
		else if (i==0)
		{
			printf(" *");
			for (j=1; j<n; j++) printf(" ");
			printf(" *");
			for (j=1; j<n; j++) printf(" ");
			printf(" *\n");
		}
		else
		{
			for (j=i; j<0; j++) printf(" ");
			for (j=1; j<=n+2*i+1; j++)
				if (i==1-(n>>1)) printf(" *");
				else if (j==1||j==n+2*i+1) printf(" *");
				else printf(" ");
			for (j=1; j<=-1-2*i; j++) printf(" ");
			for (j=1; j<=n+2*i+1; j++)
				if (i==1-(n>>1)) printf(" *");
				else if (j==1||j==n+2*i+1) printf(" *");
				else printf(" ");
			printf("\n");
		}
}
int main()
{
	printf("Please input the size (n>=4):");
	scanf("%d",&n);
	draw(n);
	return 0;
}