Can somebody please just break down the acceptance criteria for this step in the exercise? Like you're writing a user story. The instructions are so unclear about the purpose of the exercise. I don't need anybody to define the solution. Just tell me the output goal and I'll make it work. If the acceptance criteria is simply to return a string for each possible outcome, just say that!
In case codeacademy is reading this, you really need to rewrite this exercise. Things were good until here.