main = getLine >>= putStrLn . f . map (read :: String -> Int) . words where
    f [y,m,d]
        | y == 1989 && m == 1   = if d > 7 then "Yes" else "No"
        | y >= 1989 && y < 2019 = "Yes"
        | y == 2019 && m <= 4   = "Yes"
        | otherwise             = "No"