import sys
A = input().split(".")
B = input().split(".")
for y in range(len(B)):
	while len(B[y]) != len(A[y]):
		if len(B[y]) > len(A[y]):
			A[y] += "0"
		else:
			B[y] += "0"
	for x in range(len(B[y])):
		if int(B[y][x]) > int(A[y][x]):
			print("NO")
			sys.exit()
		if int(B[y][x]) < int(A[y][x]) or (y == len(B) - 1 and x == len(B[y]) - 1 and int(B[y][x]) <= int(A[y][x])):
			print("YES")
			sys.exit()