kaseki = input()
target = input()


kaseki_version = kaseki.split('.')
target_version = target.split('.')

if kaseki_version[0] >  target_version[0]:
    print("YES")
elif kaseki_version[1] > target_version[1]:
    print("YES")
elif kaseki_version[2] >= target_version[2]:
    print("YES")
else:
    print("NO")