A:排除号码:
排除前区:01,02,09,13,16,24,33,34=0-1
排除后区:01,05,09,10
B:龙头凤尾:
龙头关注:03或05
凤尾关注:30或31
C:前区方案:
a-10码:03,05,06,11,18,20,27,29,30,31
b-14码:03,05,06,11,14,18,19,20,21,25,27,29,30,31
c-18码:03,04,05,06,07,08,10,11,14,18,19,20,21,25,27,29,30,31
D:后区方案:
后区2码:02,04
后区4码:02,04,11,12
后区6码:02,03,04,07,11,12