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From: "B. Pym" <Nobody447095@here-nor-there.org>
Newsgroups: comp.lang.lisp,comp.lang.scheme
Subject: Re: Multivalue tail recursion?
Date: Tue, 27 Aug 2024 22:19:41 -0000 (UTC)
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Kent M. Pitman wrote:

> 
>  (loop for x in '(3 5 7)
>        for y in '(2 5 8)
>        when (= x y)
>          collect (cons x y))

What if there were more than two lists?
This will handle any number of lists:

Scheme:

(filter-map
  (lambda xs (and (apply = xs) xs))
  '(0   3 5   7 9)
  '(0   2 5.0 8 9.0)
  '(2   4 5   8 9))

((5 5.0 5) (9 9.0 9))