my solution :)
it differs from the challenge output because I removed several rows of strings that contain numbers, which I don't consider to be words. I also treated words like "the", "The", "THE" as the same word, and think this is a more correct solution
Spoiler
Great challenge, but like some other comments I read, I started getting different numbers. Eventually got it down to converting all mine to lowercase - removing this made things match. Another nice reminder to get myself more familiar with RegEx.
