A:排除号码:
排除前区:04,05,06,13,15,24,28,32=0-1
排除后区:01,02,07,08
B:龙头凤尾:
龙头关注:01或03
凤尾关注:30或31
C:前区方案:
a-10码:01,03,07,09,14,16,27,29,30,31
b-14码:01,03,07,09,14,16,19,21,22,26,27,29,30,31
c-18码:01,03,06,07,09,10,12,14,16,17,19,21,22,26,27,29,30,31
D:后区方案:
后区2码:03,05
后区4码:03,05,06,09
后区6码:03,05,06,09,10,11