first_s = input()
first_d = first_s.split(".")
first_int = int(first_d[0]+first_d[1]+first_d[2])
second_s = input()
second_d = second_s.split(".")
second_int = int(second_d[0]+second_d[1]+second_d[2])
result = ""

if first_int >second_int:
	result = "YES"
else:
	result="NO"

print(result)