排除前区:06,16,21,22,24,28,32,33=0-1
排除后区:01,02,10,11
B:龙头凤尾:
龙头关注:01或03
凤尾关注:34或35
C:前区方案:
a-10码:01,03,05,11,13,15,26,27,34,35
b-14码:01,03,05,11,12,13,14,15,26,27,29,31,34,35
c-18码:01,02,03,04,05,07,10,11,12,13,14,15,26,27,29,31,34,35
D:后区方案:
后区2码:07,09
后区4码:04,05,07,09
后区6码:04,05,06,07,08,09