271期：<<02,09,11,13,14,15,17,21,22,25,26,32,33,36,40,47>>开：26中中中
272期：<<01,05,07,16,18,19,26,30,32,33,34,38,40,46,47,49>>开：23错错错
273期：<<05,08,12,13,15,16,23,27,33,34,36,37,41,42,44,45>>开：05中中中
274期：<<02,03,06,14,16,17,19,21,25,29,34,35,41,42,47,48>>开：24错错错
275期：<<01,02,06,07,10,14,15,16,17,19,22,24,25,26,29,41>>开：中？