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handling lists in perl

not really on the topic but...
I'm not very good at perl (or anything else ) and could maybe sort it but perhaps there is an extension that does it.
I have an list of pairs
and an array of unique numbers
(1 21 100 8 15 22 6 12 15.... )
I want to see what pairs can be satisfied from the array of numbers, send that list to a file and also to another file the left over numbers.


Key ID    4BFEBB31