排除前区:05,06,08,12,20,22,29,32=0-1
排除后区:08,09,10,12
B:龙头凤尾:
龙头关注:03或11
凤尾关注:34或35
C:前区方案:
a-10码:03,11,13,15,17,21,28,33,34,35
b-14码:01,02,03,04,11,13,15,17,19,21,28,33,34,35
c-18码:01,02,03,04,11,13,15,17,19,21,25,26,27,28,30,33,34,35
D:后区方案:
后区2码:03,05
后区4码:03,05,07,11
后区6码:01,03,05,06,07,11