266期：((02,05,06,17,18,25,26,29,31,33,36,37,38,40,44,46))开：40准
267期：((01,05,06,08,13,19,27,29,37,40,41,42,43,45,48,49))开：22错
268期：((05,08,09,16,23,25,27,29,31,32,36,37,39,40,41,47))开：32准
269期：((02,03,05,13,14,15,17,21,22,24,27,31,42,43,45,48))开：37错
270期：((04,09,11,16,17,20,22,26,28,29,30,31,38,44,45,48))开：44准
271期：((01,02,03,04,07,20,22,24,27,31,32,36,40,44,46,49))开：==？