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module Origami import StdEnv sum` = foldr (+) 0 prod` = foldr (*) 1 flatten` = foldr (++) [] length` = foldr (\x l=l+1) 0 reverse` = foldl (\xs x=[x:xs]) [] takeWhile` p = foldr (\x xs=if (p x) [x:xs] []) [] maxList` = foldr (\x m=if (m<x) x m) 0