[Haskell-cafe] Properties of monads

[Radosław Grzanka]

Hello,
  I am writing some toys programs to learn and try to apply Monads
properties (without success, I must say). Although I spent half a day
on this code:

http://hpaste.org/3957

I couldn't simplify (shorten) getStrip function. After reading "Doing
it with class" (
http://www.haskell.org/all_about_monads/html/class.html ) I had an
impression that I could "collapse" cases using some Monads properties.
But maybe I misunderstood something.

Can anyone look at it and give me a pointers?? (I don't mind if the
code becomes unreadable a bit.)

Thank you,
  Radek.