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Jan 22nd, 2018
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  1.  
  2. import Maybe
  3. import Data.List
  4.  
  5. lcase str =
  6. [ if elem c ['A'..'Z']
  7. then ['a'..'z'] !! fromMaybe 0 (elemIndex c ['A'..'Z'])
  8. else c | c <- str ]
  9.  
  10. main = print (lcase "Moo")
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