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6 lines
86 B
Racket
6 lines
86 B
Racket
3 years ago
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#lang yaragg
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7 years ago
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top : xs | ys | zs
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7 years ago
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xs : () | "x" xs
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7 years ago
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ys : Ø | "y" /ys
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zs : ∅ | "z" @zs
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