Grab the and of the DIR*() UDFs in the UDF section. Then enumerate the requested list of files and copy them to the destination. Be aware, that what you are trying to do will take a long time if there are a lot of directories because everysingle directory must be scanned.

It might be easier to require all documents to be saved in a specific location. Then you just need to copy the parent folder of that location.
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There are two types of vessels, submarines and targets.