#coding: UTF-8

import sys
import re
import itertools
from math import log
from collections import deque

### defs ###


### main ###
v1 = list(map(int,sys.stdin.readline().split('.')))
v2 = list(map(int,sys.stdin.readline().split('.')))
v1 = v1[0]*1000000+v1[1]*1000+v1[2]
v2 = v2[0]*1000000+v2[1]*1000+v2[2]
if (v1>=v2):
	print('YES')
else:
	print('NO')