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From: atieu@skat.usc.edu (Anthony Tieu)
Newsgroups: comp.lang.lisp
Subject: help with function
Message-ID: <22858@usc.edu>
Date: 13 Feb 90 23:02:46 GMT
Sender: news@usc.edu
Organization: University of Southern California, Los Angeles, CA
Lines: 14

I am a beginner at programming in LISP. Forgive me if this is too
simple. I want to write a function that concatenate the 1st and 2nd 
word of a list in reverse order to the list itself. Example
	(cat '(a b c d e f g))  returns
	(B A A B C D E F G)
This can be done by (cons (second l) (cons (first l) l)).
The problem I have been facing is that I need to be able to do it
with nested lists. Example
	(cat '(a b c d (f g h) i j (k l m) p)) should return
	(B A A B C D (G F F G H) I J (L K K L M) P)
Can this be done recursively?

Help!
Anthony