A:排除号码:
排除前区:02,03,07,11,12,20,27,31=0-1
排除后区:06,08,09,11
B:龙头凤尾:
龙头关注:04或06
凤尾关注:26或29
C:前区方案:
a-10码:04,06,09,10,13,15,16,22,26,29
b-14码:04,06,09,10,13,15,16,19,22,23,26,29,30,32
c-18码:01,04,05,06,08,09,10,13,15,16,17,19,22,23,26,29,30,32D:后区方案:
后区2码:03,05
后区4码:01,02,03,05
后区6码:01,02,03,04,05,12