A:排除号码:
排除前区:01,03,07,11,13,16,21,26=0-1
排除后区:02,04,08,10
B:龙头凤尾:
龙头关注:02或04
凤尾关注:30或31
C:前区方案:
a-10码:02,04,08,10,19,22,25,27,30,31
b-14码:02,04,06,08,10,12,19,22,25,27,30,31,33,35
c-18码:02,04,06,08,10,12,18,19,20,22,23,25,27,29,30,31,33,35
D:后区方案:
后区2码:03,05
后区4码:03,05,09,11
后区6码:01,03,05,07,09,11