>>466
(defun chikan (x)
   (labels ((hentai (x)
              (if (atom x)
           (case x
                    (a (list '|a|))
                    (b (list '|b|))
                    (c (list '|a| '|b|)))
                  (list (loop for y in x
                           append (hentai y))))))
     (hentai x)))