248期：<<02,04,05,06,08,19,20,22,23,28,32,33,36,37,38,46>>开：20中中中
249期：<<01,03,04,08,12,17,21,26,27,29,32,36,37,39,47,49>>开：23错错错
250期：<<01,05,06,07,09,11,15,18,26,32,33,34,36,41,42,45>>开：14错错错
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：中？