Although not a good idea, this is the only recursive solution :)

This one is great. I ran up my code to 30 lines doing a similar concept but with many more unecessary steps. Had tunnel vision and didn't consider recursion! Thanks.

I love your solution

how could this get 18 Best Practice and 11! Clever marks? this solution is certainly neither of them.

would you like to elaborate on that? for us to understand the reasons behind your statement.