249期：((02,05,06,07,08,15,20,22,23,25,26,31,39,41,47,48))开：02准
250期：((02,03,08,09,14,15,21,23,25,26,31,34,37,44,46,49))开：04错
251期：((07,11,12,13,16,19,21,23,25,26,35,39,40,41,44,46))开：41准
252期：((06,09,10,13,15,18,22,24,26,27,28,30,34,40,43,49))开：24准
253期：((02,03,10,12,13,19,20,23,25,28,37,39,40,42,45,47))开：==？