248期：<<01,06,10,11,12,20,23,26,30,31,33,40,44,46,47,49>>开：12中中中
249期：<<02,03,11,12,13,15,20,21,24,30,32,34,36,40,43,46>>开：02中中中
250期：<<01,10,11,14,16,18,21,23,26,27,28,29,30,44,46,48>>开：12错错错
251期：<<05,10,11,12,14,20,22,24,27,29,35,38,41,44,45,49>>开：中？