A:排除号码:
排除前区:03,06,08,11,15,16,33,34=0-1
排除后区:03,08,11,12
B:龙头凤尾:
龙头关注:01或04
凤尾关注:26或31
C:前区方案:
a-10码:01,04,09,14,20,21,24,25,26,31
b-14码:01,04,09,14,17,18,20,21,22,23,24,25,26,31
c-18码:01,04,05,07,09,14,17,18,20,21,22,23,24,25,26,27,31,32
D:后区方案:
后区2码:02,04
后区4码:02,04,06,10
后区6码:01,02,04,05,06,10