206期：((05,09,15,18,22,23,26,31,33,35,38,39,41,44,46,47))开：26准
207期：((06,10,15,17,21,24,25,30,32,37,38,41,42,43,46,48))开：42准
208期：((03,08,11,12,19,22,25,26,29,36,37,39,40,43,44,47))开：04错
209期：((04,05,07,15,17,22,27,28,30,34,37,39,40,41,46,47))开：41准
210期：((01,02,04,06,11,15,22,23,26,27,30,34,43,45,48,49))开：==？
