排除前区:02,09,10,18,25,32,34,35=0-1
排除后区:05,06,09,10
B:龙头凤尾:
龙头关注:03或06
凤尾关注:31或33
C:前区方案:
a-10码:03,06,14,16,17,24,28,30,31,33
b-14码:01,03,04,05,06,07,14,16,17,24,28,30,31,33
c-18码:01,03,04,05,06,07,08,14,16,17,20,22,24,26,28,30,31,33
D:后区方案:
后区2码:01,04
后区4码:01,04,11,12
后区6码:01,04,07,08,11,12