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__ __ __ __ ____ ___ _________________________________________
|| || || || || || ||__ Hugs 98: Based on the Haskell 98 standard
||___|| ||__|| ||__|| __|| Copyright (c) 1994-2005
||---|| ___|| World Wide Web: http://haskell.org/hugs
|| || Report bugs to: hugs-bugs@haskell.org
|| || Version: March 2005 _________________________________________
Hugs mode: Restart with command line option +98 for Haskell 98 mode
Type :? for help
Ambiguous> [Add (Id "a") Plus (Add (Id "b") Plus (Add (Id "c") Plus (Id "d"))),Add (Id "a") Plus (Add (Add (Id "b") Plus (Id "c")) Plus (Id "d")),Add (Add (Id "a") Plus (Add (Id "b") Plus (Id "c"))) Plus (Id "d"),Add (Add (Id "a") Plus (Id "b")) Plus (Add (Id "c") Plus (Id "d")),Add (Add (Add (Id "a") Plus (Id "b")) Plus (Id "c")) Plus (Id "d")]
Ambiguous> [Leaving Hugs]
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