[如果有两个子列表
`[[A,B],[1,2]]`
我想要输出
[[A,B],[1,2]
[A,B],[2,1]
[B,A],[1,2]
[B,A],[2,1]]
对于三个子列表
`[[A,B],[1,2], [c, d]]`
我想要输出
`[[A,B],[1,2], [c, d],
[A,B],[1,2], [d, c],
[A,B],[2,1], [c, d],
[A,B],[2,1], [d, c],
[B,A],[1,2], [c, d],
[B,A],[1,2], [d, c],
[B,A],[2,1], [c, d]
[B,A],[2,1], [d, c]]`