Cat Watch

n = int(input())

for i in range(0, n - 2):
    print(f'{" " * n}||{"_" * (n - 2)}||{" " * n}')

print(f'{" " * (n - 1)}//{" " * n}\\\\{" " * (n - 1)}')

for i in range(1, n - 3):
    print(f'{" " * (n - 2)}||{" " * (n + 2)}||{("]" if i == int((n - 3) / 2) else "")}')

print(f'{" " * (n - 1)}\\\\{" " * n}//{" " * (n - 1)}')

for i in range(0, n - 2):
    print(f'{" " * n}||{"_" * (n - 2)}||{" " * n}')