https://www.acmicpc.net/problem/10992
n=int(input())
for i in range(1,n):
for j in range(n-i,0,-1): print(" ",end='')
print("*",end='')
for j in range((i-2)*2+1): print(" ",end='')
if i!=1: print("*",end='')
print()
for i in range((n-1)*2+1): print("*",end='')