this is the commented version of my previous entry (solution 181910)
this is my original submission modified for ease of reading
whoops, didn't see your thing about "easy to understand code."
Find the two-word state names
Filter AC, pass DC
Back to basics 23 - Triangular matrix
Whether the input is vector?
Rotate input square matrix 90 degrees CCW without rot90
Getting logical indexes
Scoring for oriented dominoes
Poker Series 08: IsPair
String substitution, sub problem to cryptoMath
Poker Series 01: isStraightFlush
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