did it without regex. brave warrior

whelp, that's pretty much the human condition, when you think about it

I'm disgusted but in awe. 👏👏👏👏

In the case foo9, it removes the 9 and does recursion with "foo".
So the recursion returns "foo1", then the zero is added to the recursion result.

So if it's foo99, it does recursion with foo9 and adds the zero to that.
Then the recursion would return what I mentioned in my first paragraph, plus a zero so it's foo100.

Really impressed by your solution :)

clever!!
bravo (:

When you hate regexp :D

what is the solution

smart solution