(load "streams.txt")

(define (merge s1 s2)
  (cond ((stream-null? s1) s2)
        ((stream-null? s2) s1)
        (else
          (let ((s1car (stream-car s1))
                (s2car (stream-car s2)))
            (cond ((< s1car s2car)
                   (cons-stream s1car (merge (stream-cdr s1) s2)))
                  ((> s1car s2car)
                   (cons-stream s2car (merge s1 (stream-cdr s2))))
                  (else
                   (cons-stream s1car (merge (stream-cdr s1)
                                             (stream-cdr s2)))))))))

(define S (cons-stream 1 (merge (scale-stream S 2)
                                (merge (scale-stream S 3)
                                       (scale-stream S 5)))))