Work on problem 2.
Close on problem 2, so save.
Solved problem 2, which is a miracle because I'm an idiot.
Problem 3. I think it's solved but it's yelling at me about tuples.
Fixed problem 3 so it passed. emit needs double parentheses, duh.
Problem 4. Wow. Two lines. Over an hour. Still need to sort.
Problem 4. Maybe I have the right map now. Too long.
Don't want to lose this.
Scott fixed problem 3.
Problem 4: Well, I print the output in the right format, but the answers are wrong.