func main()
	var y: int :: cui@inputInt()
	var m: int :: cui@inputInt()
	var d: int :: cui@inputInt()
	var x: int :: y * 10000 + m * 100 + d
	var ans: bool :: 19890108 <= x & x <= 20190430
	do cui@print(ans ?("Yes\n", "No\n"))
end func