(define (chk3p n)
  (cond
   ((= 0 (mod n 3)) #t)
   ((or (= 3 (div n 10)) (= 3 (mod n 10))) #t)
   (else #f)))

(define (take3 ap)
    (filter (^ (x) (chk3p x)) ap))

(let* ((from (read)) (to (read)))
  (map (^ (x) (display x) (newline))
       (take3 (iota (+ 1 (- to from)) from)))
  )