input = N
for x in range(2 * input - 1): print ("*", end="")
print("") i = 0
for x in range(input - 1):
  for y in range(i+1): print(" ", end="")
  print("*", end="")
  for z in range(2 * input - 1 - 2 * (i+2)):
    print(" ", end="")
    if i != input - 2: print("*")
    else: print("")
    i += 1
    i = input - 3
    for x in range(input - 2):
      for y in range(i+1):
        print(" ", end="")
      print("*", end="")
      for z in range(2 * input - 1 - 2 * (i+2)): print(" ", end="") if i != -1: print("*") i -= 1
       for x in range(2 * input - 1): print ("*", end="")