# -*- coding: utf-8 -*-

A = map(int, raw_input().split("."))
X = map(int, raw_input().split("."))

assert all(0 <= x <= 100 for x in A)
assert all(0 <= x <= 100 for x in X)

# WA解

for i in xrange(3):
    if A[i] < X[i]:
        print "NO"
        break
else:
    print "YES"