import           A
>
import           B

{-# LANGUAGE FlexibleContexts, OverloadedStrings, RecordWildCards, RankNTypes #-}

blah x
  | x = do
      putStrLn a

unless x $
  unless y $
    putStrLn "Hello"

a =
  let (x, y) = z
  in z

a = (x ++)