排除前区:03,04,07,12,18,19,28,30=0-1
排除后区:02,03,05,06
B:龙头凤尾:
龙头关注:05或08
凤尾关注:34或35
C:前区方案:
a-10码:05,08,09,11,14,16,26,32,34,35
b-14码:01,02,05,06,08,09,10,11,14,16,26,32,34,35
c-18码:01,02,05,06,08,09,10,11,14,15,16,20,23,25,26,32,34,35
D:后区方案:
后区2码:07,08
后区4码:07,08,09,11
后区6码:04,07,08,09,11,12