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$ Card 1: 41 48 83 86 17 | 83 86 6 31 17 9 48 53
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$ Card 2: 13 32 20 16 61 | 61 30 68 82 17 32 24 19
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$ Card 3: 1 21 53 59 44 | 69 82 63 72 16 21 14 1
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$ Card 4: 41 92 73 84 69 | 59 84 76 51 58 5 54 83
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$ Card 5: 87 83 26 28 32 | 88 30 70 12 93 22 82 36
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$ Card 6: 31 18 13 56 72 | 74 77 10 23 35 67 36 11
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TestInput ←
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Parse ← ∩(⊜⋕≠@ .°□)°⊟⊏1_3 ⊢regex "((\\d+\\s+)+)\\|((\\s+\\d+)+)"
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PartIPre ← ⌊ⁿ:2-1/+♭⊞=Parse
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PartIPost ← /+
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PartIIPre ← /+♭⊞=Parse
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PartIIPost ← (
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⊃(∘|+1⊚⧻)
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∧(⬚0++⊃(⊚⊙⊢|⋅(↘1)|⋅(+⊢)))⊙⊙0
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;
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)
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PartIPost ⊜PartIPre ≠@\n. TestInput
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PartIIPost ⊜PartIIPre ≠@\n. TestInput
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PartIPost ⊜PartIPre ≠@\n. &fras "day04.in"
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PartIIPost ⊜PartIIPre ≠@\n. &fras "day04.in"
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