A:排除号码:
排除前区:05,07,08,10,18,22,32,34=0-1
排除后区:01,07,08,09
B:龙头凤尾:
龙头关注:01或02
凤尾关注:29或31
C:前区方案:
a-10码:01,02,04,15,16,25,27,28,29,31
b-14码:01,02,04,15,16,20,23,24,25,27,28,29,30,31
c-18码:01,02,04,09,11,12,15,16,20,23,24,25,26,27,28,29,30,31D:后区方案:
后区2码:11,12
后区4码:02,04,11,12
后区6码:02,03,04,05,11,12