A:排除号码:
排除前区:05,06,08,18,25,28,32,33=0-1
排除后区:06,10,11,12
B:龙头凤尾:
龙头关注:02或07
凤尾关注:30或31
C:前区方案:
a-10码:02,07,09,10,13,16,24,29,30,31
b-14码:02,03,07,09,10,13,16,17,19,23,24,29,30,31
c-18码:02,03,07,09,10,11,13,16,17,19,20,21,23,24,26,29,30,31
D:后区方案:
后区2码:07,08
后区4码:02,04,07,08
后区6码:01,02,03,04,07,08