251期：<<07,10,12,16,19,23,27,29,30,33,34,37,38,40,47,48>>开：30中中中
252期：<<01,02,05,06,09,10,13,22,24,25,29,30,34,38,39,49>>开：22中中中
253期：<<03,04,06,07,14,19,23,25,26,30,33,38,40,41,42,48>>开：16错错错
254期：<<02,03,04,08,12,15,17,33,34,35,36,40,43,44,45,46>>开：02中中中
255期：<<02,04,08,10,11,16,22,27,29,38,39,40,43,46,47,48>>开：44错错错
256期：<<11,22,27,28,29,30,31,32,33,38,41,42,43,45,46,49>>开：中？