infixorder

[oriana paro]

Hi. I'm learning scheme (Guile) and I have some problem with the infix order 
walk in a tree...
I want to write a function infixwalk that walks though a tree in infix order 
(left tree - node - righ tree) so that the call
(equal?
   (infixwalk
       '( (a) b ( (c) d (e) ) )
    )
    '(b a d c e)
)
returns #t.
Anyone can help me?? Thanks in advance.




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