On 19/02/2021 18:14, Michael F. Stemper wrote: >> and cons. LISP only had cons. :-) LOL -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ http://www.amazon.com/author/alan_gauld Follow my photo-blog on Flickr at: http://www.flickr.com/photos/alangauldphotos