排除前区:02,09,10,15,22,27,29,35=0-1
排除后区:01,03,11,12
B:龙头凤尾:
龙头关注:01或03
凤尾关注:32或32
C:前区方案:
a-10码:01,03,11,13,16,18,26,28,32,34
b-14码:01,03,06,08,11,13,16,17,18,20,26,28,32,34
c-18码:01,03,04,05,06,08,11,12,13,14,16,17,18,20,26,28,32,34
D:后区方案:
后区2码:05,07
后区4码:05,07,09,10
后区6码:02,05,06,07,09,10