I have really struggled with this one just to understand what this question is asking. At first I thought it was saying something like

can you fit the sub-sequences on top of the original sequence so that the whole original sequence is covered? Sub-sequences that cannot be overlayed on to the original sequence are discarded. But, after coding that up and failing the test cases, clearly that is not what they are asking.

Here is one their example test cases from the problem statement:

```
Input:
org: [1,2,3], seqs: [[1,2],[1,3]]
Output:
false
Explanation:
[1,2,3] is not the only one sequence that can be reconstructed, because [1,3,2] is also a valid sequence that can be reconstructed.
```

I read this and I think well "[1,3]" is not a valid sub-sequence so throw that away and "[1,2]" is valid but is not enough to cover the original sequence. But that is not what is going on because they say these sub-sequences can form "[1,2,3]" AND "[1,3,2]".

Um, huh????

What can you do with "[1,3]"?

Please help me understand what the problem is asking. Thanks!