a:排除号码:
排除前区:02,04,12,14,21,20,26,32=0-1
排除后区:01,04,07,11
b:龙头凤尾:
龙头关注:03或05
凤尾关注:27或28
c:前区方案:
a-10码:03,05,08,10,17,19,23,25,27,28
b-14码:03,05,08,10,15,17,19,22,23,24,25,27,28,31
c-18码:03,05,06,08,10,11,15,16,17,18,19,22,23,24,25,27,28,31
d:后区方案:
后区2码:08,10
后区4码:02,05,08,10
后区6码:02,05,08,09,10,12