A:排除号码:
排除前区:04,11,14,17,20,24,26,30=0-1
排除后区:02,06,09,11
B:龙头凤尾:
龙头关注:01或03
凤尾关注:32或33
C:前区方案:
a-10码:01,03,10,12,18,25,27,31,32,33
b-14码:01,03,10,12,18,19,22,23,25,27,29,31,32,33
c-18码:01,02,03,06,09,10,12,15,18,19,22,23,25,27,29,31,32,33
D:后区方案:
后区2码:10,12
后区4码:05,07,10,12
后区6码:01,04,05,07,10,12