排除前区:01,03,08,17,25,28,29,35=0-1
排除后区:03,05,06,09
B:龙头凤尾:
龙头关注:02或11
凤尾关注:27或30
C:前区方案:
a-10码:02,11,12,13,15,16,18,23,27,30
b-14码:02,04,05,07,09,11,12,13,15,16,18,23,27,30
c-18码:02,04,05,06,07,09,11,12,13,14,15,16,18,21,23,27,30,34
D:后区方案:
后区2码:08,10
后区4码:02,04,08,10
后区6码:02,04,07,08,10,11