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diff --git a/week5/mart/Origami.icl b/week5/mart/Origami.icl
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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