b_major, b_minor, b_build = map(int, input().split('.'))
t_major, t_minor, t_build = map(int, input().split('.'))

if b_major > t_major:
    print('YES')
elif b_major == t_major and b_minor > t_minor:
    print('YES')
elif b_major == t_major and b_minor == t_minor and b_build > t_build:
    print('YES')
elif b_major == t_major and b_minor == t_minor and b_build == t_build:
    print('YES')
else:
    print('NO')