Beginner, so this could certainly be my fault, but whenever there’s raw_input required for the exercise… oh , it’s bad.
For example, in this case, the code is correct (as far as I can tell!), but when you run it, you can’t enter any letters or numbers or anything to respond to the raw_input. While it’s “thinking” (ball of death in lower left corner), still can’t enter anything, until a couple minutes pass by, and you get multiple error messages, or entries as if nothing were added “Sorry… etc.” text.
Any ideas? Uploaded a screenshot to show what I mean.