Exercise 3.68: Louis Reasoner thinks that
building a stream of pairs from three parts is unnecessarily complicated.
Instead of separating the pair 
  
    (
    
      S
      0
    
    ,
    
      T
      0
    
    )
  
 from the rest of the pairs in
the first row, he proposes to work with the whole first row, as follows:


(define (pairs s t)
  (interleave
   (stream-map
    (lambda (x) 
      (list (stream-car s) x))
    t)
   (pairs (stream-cdr s)
          (stream-cdr t))))

Does this work?  Consider what happens if we evaluate (pairs integers
integers) using Louis’s definition of pairs.