Very nice indeed. How about a non-re based implementation? More

I did have to resort to stack overflow for help on this one. This also told me a lesson about the necessity of index bounds checking in real life! More

You did not re-invent the wheel at all. I solved this without a reference to the re module whatsoever. Tell me about re-inventing the wheel! All the best. Francois More

Well, the RE module provides Perl based regular expressions and, of course, given enough pattern rules substitutions you will eventually get it to submit to your needs. That would be the professional way to go for old folks like myself. However, I myself chose to ignore the RE module altogether and More