raptor writes,

]- that is the problem :"), 'cause such functions should accept Char and String, but return a Tuple of Strings, but it is recursive (so that it fetch next,next,next char :)) i.e. it is own "consumer" and should return String

--this is wrong, just tring grab char (x:xs)

You might also have a look at http://haskell.org/hawiki/WorkerWrapper This idea should apply here. -Chad Scherrer