The output is due to the fact that 'b' is repeated in @b so the offset in %map is for the second 'b'. I think I'll leave the code as it is for the time being and just add a caveat that it won't work when there are duplicates in @b. Thanks once again :)

_________
broquaint

In reply to Re: Re: Re: Finding largest common subset in lists? by broquaint
in thread Finding largest common subset in lists? by anjiro

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