def kongxin(n):	for i in range(n):	print()	for j in range(n - i - 1):	print(' ', end='')	for k in range(2 * i + 1):	if k==0 or k==2*i:	print('*', end='')	else:	print(' ',end='')	for i in range(n-1):	print()	for j in range(i + 1):	print(' ', end='')	for k in range(2*(n-i)-3):	if k==0 or k==2*(n-i)-4:	print('*', end='')	else:	print(' ',end='')