(define yuki779
  (let*
    (
      (y (read))
      (m (read))
      (d (read))
      (yes "Yes\n")
      (no "No\n")
    )
    (display
      (cond
        ((or (< y 1989) (< 2019 y)) no)
        ((< 1989 y 2019) yes)
        ((= y 1989)
          (cond
            ((< 1 m) yes)
            (and (= 1 m) (< d 8) no)
            (else yes)))
        (else (if (<= m 4) yes no))))))