You link to a discussion of permutations but the original poster requested combinations and it appears to me that the code here does find combinations (though I didn't fully digest the code so I could be wrong). Update: But actually running the code (modified so that I don't need the mentioned module) shows that it is finding permutations. *sigh* (:

Confusion between these two is not uncommon. See (tye)Re: Permutations for another instance and a bit of explanation of how to tell the two apart.

        - tye (but my friends call me "Tye")

In reply to (tye)Re2: Finding all Combinations by tye
in thread Finding all Combinations by narse

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