A:排除号码:
排除前区:01,07,10,16,20,24,33,35=0-1
排除后区:01,04,07,11
B:龙头凤尾:
龙头关注:02或04
凤尾关注:27或31
C:前区方案:
a-10码:02,04,09,12,14,17,19,25,27,31
b-14码:02,04,09,12,14,17,18,19,22,25,26,27,30,31
c-18码:02,03,04,06,09,12,13,14,15,17,18,19,22,25,26,27,30,31
D:后区方案:
后区2码:06,08
后区4码:02,03,06,08
后区6码:02,03,05,06,08,09