Thanks! That's funny, because seeing yours is what made me go back and redo it. You might have noticed that I took your idea of a fill function, and some other stuff... :]

By the way, I've made a small edit: you previously generated boxes with a \n at the end, unlike the boxes in the starting test cases. I removed the trailing newline for consistency.

I was hoping you wouldn't see that! :p I didn't read the description carefully enough so I was very confused when it started expecting a list of the things that didn't fit. My bad!

I did have fun. Good kata, thanks for making it!