277期：<<01,03,08,16,18,21,26,32,33,34,35,37,39,41,43,45>>开：26有
278期：<<08,09,10,18,19,23,24,30,31,32,34,35,36,38,40,48>>开：07无
279期：<<01,02,05,06,10,13,15,17,18,19,29,30,33,34,41,46>>开：40无
280期：<<04,06,09,13,16,18,21,22,25,27,29,35,41,42,45,49>>开：22有
281期：<<03,05,07,08,10,18,21,22,28,33,35,39,43,44,47,48>>开：88