let () =
    let y, m, d = Scanf.scanf "%d %d %d\n" (fun a b c -> a, b, c) in
    Printf.printf "%s\n" (if (1989 < y  && y < 2019) || (y = 2019 && m <= 4) || (y = 1989 && ((m = 1 && 7 < d) || 1 < m)) then "Yes" else "No")