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data Product = Book [Char] [Char] | Video [Char] | CD [Char] [Char] [Int] deriving (Show, Eq) --getTitle (Book "Evgeny Onegin" "Aleksandr Pushkin") getTitle :: Product->[Char] getTitle (Book x _) = x getTitle (Video x) = x get

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main = putStrLn "hello world"

data Product = Book [Char] [Char] | Video [Char] | CD [Char] [Char] [Int] deriving (Show, Eq) --getTitle (Book "Evgeny Onegin" "Aleksandr Pushkin") getTitle :: Product->[Char] getTitle (Book x _) = x getTitle (Video x) = x get

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