How to remove items from list by key?

I want to remove items from a list. The list contains 0-5 sub-list. The key list that is used for comparing also contain 0-5 sub-list but the number of item in the sub-list is different. How can I filter only the item that is equal to the item from the key list.

Cross product lacing on the == node. Then List.Contains looking for a true at level two of the result. Lastly filter by book mask.

Levels and lacing should be reviewed each step.

You could also try this python script:

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