请问执行完以下代码后，输出结果为？( )

def is_lucky(num):

if num % 6 == 0:

return True

while num > 0:

if num % 10 == 6 or num % 10 == 8:

return True

num /= 10

return False

ls = [13, 666, 888, 32, 332, 987, 555, 345, 876]

cnt = 0

for n in ls:

if is_lucky(n):

cnt += 1

print(cnt)