280期：→№←【04,05,07,11,12,13,15,17,18,20,24,25,26,30,32,34,36,37,39,41,43,45,48,49】开：20对
281期：→№←【02,05,06,07,10,11,14,18,19,20,21,26,27,31,32,33,35,36,37,39,40,42,45,49】开：43错
282期：→№←【01,03,04,06,07,08,09,10,11,13,17,18,19,20,21,23,32,33,41,42,43,44,46,47】开：34错
283期：→№←【01,05,07,08,09,10,13,14,15,17,19,21,22,24,25,27,31,35,36,37,39,44,46,49】开：**
