276期：{{02,03,04,06,08,13,14,16,25,29,30,36,38,39,41,43}}开：14准
277期：{{02,04,05,09,12,17,18,19,22,26,29,30,38,40,47,49}}开：11错
278期：{{04,05,09,13,17,20,23,30,31,33,36,38,39,42,47,49}}开：02错
279期：{{01,02,04,05,06,10,14,15,18,21,23,25,28,30,31,38}}开：10准
280期：{{02,03,06,07,10,17,18,20,27,28,33,34,35,37,42,45}}开：00