247期:[[06,09,19,23,27,29,31,33,35,37,38,40,42,44,46,48]]开:31有
248期:[[02,03,05,06,10,12,20,21,22,23,24,26,31,39,45,47]]开:11无
249期:[[02,05,06,12,15,20,27,29,33,35,36,37,39,40,46,48]]开:32无
250期:[[04,07,08,09,11,12,20,22,23,24,25,27,30,38,40,49]]开:24有
251期:[[04,05,07,12,17,21,22,25,28,30,32,35,38,43,44,49]]开:==?