I'm actually not sure what the 'correct' answer is to their given problem. The problem statement says "Files can be rotated 90° if it helps...any files sharing dimensions should be considered identical/interchangeable." That could mean that 3x4 and 4x3 are identical boxes. The final area would still be the same (88), but the given ascii drawing output would be incorrect.

"""Bonus points if you can draw pictures of the winning configurations along the way. While drawing pictures, any files sharing dimensions should be considered identical/interchangeable."""

Note in the sample output they have 4 "distinct" configurations for the minimum size (really they're all the same, just rotated). If the two small boxes weren't identical/interchangeable, there would be 8 configurations (4 pairs of two, and each pair would be indistinguishable from eachother without labeling the small boxes A and B).

Ah, thanks, I thought it was the dimensions.