A:排除号码:
排除前区:04,08,09,14,17,21,27,33=0-1
排除后区:01,02,05,11
B:龙头凤尾:
龙头关注:07或10
凤尾关注:28或30
C:前区方案:
a-10码:07,10,11,13,16,18,20,26,28,30
b-14码:07,10,11,13,16,18,19,20,23,24,26,28,29,30
c-18码:02,03,05,07,10,11,12,13,16,18,19,20,23,24,26,28,29,30
D:后区方案:
后区2码:04,06
后区4码:04,06,10,12
后区6码:03,04,06,08,10,12