Hi! Was onto that one. didn't use a while loop though. But the thought was the same. Although I could only pass the test and not the random tests. My question is: where does 48 comes from? Can't figure it out.

I mean, my if statement involving Substring and stuff was not awfully messy and ran relatively fast but there was a function ready for that? Snap!

This last comment has become very sad. Hope its author is fine.