a:排除号码:
排除前区:01,04,06,07,13,17,21,31=0-1
排除后区:03,05,08,11
b:龙头凤尾:
龙头关注:03或05
凤尾关注:33或35
c:前区方案:
a-10码:03,05,09,11,14,16,18,20,33,35
b-14码:03,05,09,11,12,14,15,16,18,20,25,30,33,35
c-18码:03,05,09,11,12,14,15,16,18,19,20,22,24,25,30,33,34,35
d:后区方案:
后区2码:04,06
后区4码:04,06,09,12
后区6码:01,02,04,06,09,12