249期：<<04,05,10,12,15,21,22,23,24,29,31,33,37,38,44,48>>开：23有
250期：<<05,06,07,14,21,24,28,32,35,36,39,41,42,45,46,49>>开：14有
251期：<<02,06,07,08,09,14,17,21,23,24,28,38,39,40,46,48>>开：30无
252期：<<04,07,08,10,11,12,13,16,17,22,30,31,36,38,40,42>>开：22有
253期：<<01,02,04,09,13,16,18,20,25,29,34,35,36,39,41,47>>开：16有
254期：<<03,05,06,09,13,18,21,27,28,30,35,37,38,39,42,46>>开：02无
255期：<<02,08,10,12,19,21,27,28,30,34,35,38,40,44,48,49>>开：44有
7-5
256期：<<03,09,10,14,18,23,24,29,30,32,36,38,41,42,45,47>>开：01无
257期：<<03,06,07,12,14,18,21,26,28,32,33,34,40,41,44,49>>开：07有