a:排除号码:
排除前区:01,05,06,14,20,23,27,28=0-1
排除后区:01,04,05,12
b:龙头凤尾:
龙头关注:07或08
凤尾关注:31或32
c:前区方案:
a-10码:07,08,10,11,16,18,22,24,29,31,32
b-14码:07,08,10,11,16,18,19,21,22,24,25,29,31,32
c-18码:03,04,07,08,10,11,12,16,17,18,19,21,22,24,25,29,31,32
d:后区方案:
后区2码:07,09
后区4码:03,05,07,09
后区6码:02,03,05,06,07,09