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{-# language MagicHash #-}
import GHC.Integer.GMP.Internals
import GHC.Natural
main = print $ map isValidNatural [0, 1, maxWord, maxWord + 1, invalid]
where
maxWord = fromIntegral (maxBound :: Word)
invalid = NatJ# oneBigNat -- 1 would fit into the NatS# constructor.
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