a:排除号码:
排除前区:01,10,12,15,18,21,22,30=0-1
排除后区:03,07,09,11
b:龙头凤尾:
龙头关注:03或05
凤尾关注:28或31
c:前区方案:
a-10码:03,05,14,16,17,19,24,26,28,31
b-14码:03,05,14,16,17,19,20,24,25,26,27,28,31,32
c-18码:02,03,04,05,06,11,14,16,17,19,20,24,25,26,27,28,31,32
d:后区方案:
后区2码:02,04
后区4码:02,04,05,06
后区6码:01,02,04,05,06,10