(define bottles
(lambda (n)
(cond ((= n 0) (display "No more bottles"))
((= n 1) (display "One bottle"))
(else (display n) (display " bottles")))
(display " of beer")))
(define beer
(lambda (n)
(if (> n 0)
(begin
(bottles n) (display " on the wall") (newline)
(bottles n) (newline)
(display "Take one down, pass it around") (newline)
(bottles (- n 1)) (display " on the wall") (newline)
(newline)
(beer (- n 1))))))
(beer 99)