Because the print returns 1, and we need the (??{...}) block to return something that does not match, to cause the regex engine to backtrack.

In reply to Re^3: Which Permute or other module can give me all possible subsets of 6 numbers out of 40? by tybalt89
in thread Which Permute or other module can give me all possible subsets of 6 numbers out of 40? by Cody Fendant

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