def f(n,k=0):
while~n:
k+=1
try:r=eval(bin(k).translate({48:'],',49:'['})[3:-1])+[];n-=1
except:0
print(r)
for n in range(10): f(n)
ZGVmIGYobixrPTApOgogd2hpbGV+bjoKICBrKz0xCiAgdHJ5OnI9ZXZhbChiaW4oaykudHJhbnNsYXRlKHs0ODonXSwnLDQ5OidbJ30pWzM6LTFdKStbXTtuLT0xCiAgZXhjZXB0OjAKIHByaW50KHIpCiAKZm9yIG4gaW4gcmFuZ2UoMTApOiBmKG4p
[]
[[]]
[[], []]
[[[]]]
[[], [], []]
[[], [[]]]
[[[]], []]
[[[], []]]
[[[[]]]]
[[], [], [], []]