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：中？