a0,b0,c0 = map(int,input().split('.'))
a1,b1,c1 = map(int,input().split('.'))

if a0 - a1 > 0:
    print('YES')
elif (a0 - a1 == 0) and (b0 - b1 > 0) :
    print('YES')
elif (a0 - a1 == 0) and (b0 - b1 == 0) and (c0 - c1 >= 0):
    print('YES')
else:
    print('NO')