[백준] 2445

import sys
n=int(sys.stdin.readline())
for i in range(1,n+1):
    for j in range(i): print("*",end='')
    for j in range(2*(n-i)): print(" ",end='')
    for j in range(i): print("*", end='')
    print("")
for i in range(n-1):
    for j in range(n-i-1): print("*",end='')
    for j in range(2*(i+1)): print(" ",end='')
    for j in range(n - i - 1): print("*", end='')
    if i!=n-2:print("")