256期：→№←【02,03,04,05,07,09,10,12,13,14,15,17,19,20,25,28,29,32,34,38,39,41,46,48】开：48对
257期：→№←【05,06,07,08,10,11,12,15,20,21,22,23,24,25,26,27,28,29,31,33,34,37,48,49】开：28对
258期：→№←【02,03,04,05,07,08,10,17,18,19,20,21,24,26,32,34,36,37,39,40,42,44,45,49】开：38错
259期：→№←【01,02,03,05,06,09,10,12,13,15,17,19,21,25,30,32,33,35,36,37,42,43,45,47】开：47对
260期：→№←【01,02,07,10,12,15,20,21,23,24,25,26,28,29,31,33,34,35,38,39,40,44,47,48】开：03错
261期：→№←【05,07,10,12,13,15,17,18,20,22,24,27,30,31,32,35,36,38,41,43,45,46,47,48】开：**
