排除前区:01,05,06,08,13,15,26,27=0-1
排除后区:04,05,07,08
B:龙头凤尾:
龙头关注:07或09
凤尾关注:34或35
C:前区方案:
a-10码:07,09,10,19,24,30,32,33,34,35
b-14码:02,03,04,07,09,10,12,19,24,30,32,33,34,35
c-18码:02,03,04,07,09,10,12,19,20,24,25,28,30,31,32,33,34,35
D:后区方案:
后区2码:01,02
后区4码:01,02,09,12
后区6码:01,02,03,06,09,12