020期：（（03,05,12,13,14,17,23,24,31,34,37,43,44,45,47,49））开：12中中中
021期：（（01,04,05,12,13,17,18,19,21,23,26,29,30,33,41,44））开：42错错错
022期：（（01,04,11,13,15,17,22,23,24,25,31,35,38,43,48,49））开：18错错错
023期：（（05,14,18,19,23,24,28,30,32,33,36,39,41,43,45,47））开：47中中中
024期：（（02,03,06,11,13,18,19,28,32,34,35,36,41,43,44,47））开：28中中中
025期：（（02,09,10,16,17,22,25,33,37,38,40,42,45,46,47,49））开：37中中中
026期：（（09,10,14,18,19,22,31,32,34,36,37,39,42,44,46,49））开：19中中中
7中5
027期：（（01,05,08,09,12,15,21,25,28,30,31,34,35,36,38,49））开：45错错错