[Haskell-beginners] Good way of combining functions of type IO (Maybe a)

[Nathan Hüsken]

Hey,

I want to write a function, which is basically a concatenation of
functions of type "IO (Maybe a)".
When they all where of type "Maybe a", no Problem I would simple use the
Maybe monad.

|func :: Maybe c
func = do
  a <- f1
  b <- d2 a
  ...
|

but now they are of type "IO (Maybe a)". Is there some way of combing
these in a similar smart way?

Thanks!
Nathan

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