A:排除号码:
排除前区:02,11,13,14,17,19,26,31=0-1
排除后区:03,05,07,08
B:龙头凤尾:
龙头关注:10或12
凤尾关注:25或33
C:前区方案:
a-10码:10,12,15,18,21,22,23,24,25,33
b-14码:01,03,07,10,12,15,18,21,22,23,24,25,28,33
c-18码:01,03,05,07,08,10,12,15,18,21,22,23,24,25,28,32,33,35
D:后区方案:
后区2码:04,06
后区4码:04,06,10,12
后区6码:02,04,06,09,10,12