277期：→№←【01,06,08,09,10,11,13,16,17,19,21,24,27,28,30,32,33,37,38,42,45,46,48,49】开：48对
278期：→№←【02,05,09,10,11,13,17,19,20,21,22,24,25,26,27,31,32,33,35,36,38,41,44,46】开：22对
279期：→№←【01,02,03,04,05,07,10,11,13,15,17,19,21,23,24,26,28,31,32,34,35,40,44,48】开：27错
280期：→№←【01,02,04,06,07,09,10,11,15,17,18,19,21,22,23,26,27,28,31,33,38,43,48,49】开：**