n = int(input())
for i in range(n):
for j in range(1, n-i):
print(".", end="")
for j in range(i+1, 2*i+2):
print(j, end="")
for j in range(2*i, i , -1):
print(j, end="")
print()
biA9IGludChpbnB1dCgpKQoKZm9yIGkgaW4gcmFuZ2Uobik6Cglmb3IgaiBpbiByYW5nZSgxLCBuLWkpOgoJCXByaW50KCIuIiwgZW5kPSIiKQoJCglmb3IgaiBpbiByYW5nZShpKzEsIDIqaSsyKToKCQlwcmludChqLCBlbmQ9IiIpCgkKCWZvciBqIGluIHJhbmdlKDIqaSwgaSAsIC0xKToKCQlwcmludChqLCBlbmQ9IiIpCgkKCXByaW50KCk=