This is definitely the direction I was looking for! Both of these!

The problem is part of adventofcode dot com - 2015 day 21, so not a homework problem per say, and I've already solved it in another language. This is really me wanting to learn how to use arrays and hashes of stuff more effectively.

I really should have added that this is a Data Structure/Algorithm problem. In general, I want to learn how to structure the data so I can slice and dice it better. Leaving the data in two nested anonymous hashes isn't necessarily the goal. Rearranging the data to easily manipulate it would definitely be best!

I have been trying to figure out how I could use List::AllUtils to get groups of data out of this grouping or set of data. Though, changing the initial structure may be a better solution. I don't know what I don't know. That is kind of the open question. When you get a set of data like this, and please look at this fun and interesting problem, is there some sort of best practice for what you check for to decide what type of data structures to put the data into? That would truly be the magical part!