A:排除号码:
排除前区:05,14,15,17,19,24,32,35=0-1
排除后区:01,02,09,12
B:龙头凤尾:
龙头关注:01或03
凤尾关注:31或31
C:前区方案:
a-10码:01,03,06,08,11,21,23,28,30,31
b-14码:01,03,06,08,11,13,16,20,21,22,23,28,30,31
c-18码:01,02,03,06,07,08,09,11,12,13,16,20,21,22,23,28,30,31
D:后区方案:
后区2码:04,06
后区4码:04,06,10,11
后区6码:03,04,06,07,10,11