020-022期必开:

01,09,10,11,12,13,21,22,23,24,25

33,32,34,35,36,37,45,46,47,48,49

023-025期必开:

2,03,05,07,13,14,15,17,19,20,25

26,27,29,32,37,38,39,41,43,44,49

026-028期必开:

09,10,12,13,16,17,21,22,24,25,28

29,33,34,36,37,40,41,45,46,48,49

029-031期必开:

04,05,09,10,12,14,16,17,21,22,24

26,28,29,33,34,36,38,40,41,45,46

032-034期必开:

05,06,08,10,14,16,17,18,20,22,26

28,29,30,32,34,38,40,41,42,44,46

035-037期必开:

07,08,10,13,14,16,19,20,22,25,26

28,31,32,34,37,38,40,43,44,46,49

038-040期必开:

03,04,05,07,09,14,15,16,17,19,21

26,27,28,29,31,33,38,39,40,41,43

041-043期必开:

05,07,09,11,12,15,17,19,21,23,24

27,29,31,33,35,36,39,41,43,45,47

044-046期必开:

05,08,10,11,12,16,17,20,22,23,24

28,29,32,34,35,36,40,41,44,46,47

047-049期必开:

06,09,10,12,13,14,18,21,22,24,25

26,30,33,34,36,37,38,42,45,46,48