[Haskell-beginners] Code golf

[Tilmann]

given:

inputA :: IO String

inputB :: IO String

update :: String -> String -> IO ()

Is there an elegant way to refactor / code golf this:

doIt :: IO ()
doIt = do
   a <- inputA
   b <- inputB
   update a b

liftM2 doesn't work in this case..

Thank you!