A:排除号码:
排除前区:04,07,08,09,11,14,33,35=0-1
排除后区:06,07,08,11
B:龙头凤尾:
龙头关注:03或06
凤尾关注:29或30
C:前区方案:
a-10码:03,06,10,15,17,20,23,27,29,30
b-14码:01,02,03,05,06,10,12,15,17,20,23,27,29,30
c-18码:01,02,03,05,06,10,12,13,15,16,17,20,22,23,27,28,29,30
D:后区方案:
后区2码:01,03
后区4码:01,03,10,12
后区6码:01,02,03,09,10,12