It was a good introduction to understanding how to store arrays in an array. I ended up using a combination of davido and nmcfarl's code which worked quite nicely and was understandable to look at quickly.

Also, as I was halfway through reading the responses, I noticed someone named Randal L. Schwartz had replied, then a few minutes later I happen to glance down at the author of the book open in front of me... quite an honor.