(define (inc1 a) (+ 1 a))
(define (inc2 a) (+ 2 a))
(define (inc3 a)
  (+ 3 a))

(define (inc4 a) ;; a comment after code
  (+ 4 a))

(inc1 5)
(inc2 5)
(inc3 5)
(inc4 5)

(inc1 6)
(inc2 6)
(inc3 6)
(inc4 6)

