func main()
	var _: [][]char
	do _ :: cui@input().split(".")
	var abc0: int :: _[0].toInt(&) * 10201 + _[1].toInt(&) * 101 + _[2].toInt(&)
	do _ :: cui@input().split(".")
	var abc1: int :: _[0].toInt(&) * 10201 + _[1].toInt(&) * 101 + _[2].toInt(&)
	var ans: bool :: abc0 >= abc1
	do cui@print(ans ?("YES\n", "NO\n"))
end func