/^\w\w\z/&("MNCAKSCOHINMOKTNVALARIDCTX SDE GAZ ORIL IAKY"=~/$_/|
Another stoke off by adding a redundant check for Alaska, which allowed me to move Iowa and Kentucky out of the regexp and into the (more compact) string.
This suggests that there's a lesson in here about how a bit of redundancy in data can lead to more compact representations. I think we often hear problems like "match every state and nothing else" as "match every state exactly once, and nothing else."
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