#!/usr/bin/python3

import sys
import re

for input in sys.stdin.readlines():
	answer = re.search('^([1-9]{6}|0[1-9]{5}|[1-9]{1}0[1-9]{4}|[1-9]{2}0[1-9]{3}|[1-9]{3}0[1-9]{2}|[1-9]{4}0[1-9]{1}|[1-9]{5}0)$',input);
	if answer:
		print("yes")
	else:
		print("no")