a:排除号码:
排除前区:01,05,08,13,15,20,27,29=0-1
排除后区:01,02,04,12
b:龙头凤尾:
龙头关注:02或04
凤尾关注:28或30
c:前区方案:
a-10码:02,04,07,09,11,12,14,26,28,30
b-14码:02,04,07,09,11,12,14,22,23,25,26,28,30,33
c-18码:02,03,04,06,07,09,10,11,12,14,19,22,23,25,26,28,30,33
d:后区方案:
后区2码:07,09
后区4码:07,09,10,11
后区6码:05,06,07,09,10,11