#include <stdio.h>
#include <stdlib.h>
#include <math.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
	int m,n,i,j;
	scanf("%d",&m);
	while(m--){
		scanf("%d",&n);
		for(i=1;i<=2*n-1;i++){
	    for(j=1;j<=3*n;j++){
	    	if(i==n||i==2*n-1)
	    	printf("*");
	    	else if((i>n&&i<2*n-1)&&(j==1||j==3*n))
	    	printf("*");
	    	else if((i>=1&&i<=n)&&(j==n||j==2*n+1||i+j==n+1||j-i==2*n))
	    	printf("*");
	    	
	    	else if(i>=n||j-i<=2*n) 
	    	printf(" ");
	    	
		}
		printf("\n");
	}
	printf("\n");


}
	return 0;
}