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p ARGF.read.strip.lines(chomp: true).map(&:split).map {|a,b|
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a = a.ord - ?A.ord
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b = b.ord - ?X.ord
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# part 2
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b = (a + b - 1) % 3
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outcome = case
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when (a + 1) % 3 == b then 6
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when a == b then 3
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else 0
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end
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outcome + b + 1
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}.sum
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