"wiretapset.txt" is the file to store all the 63 wiretap sets. Each line is  a 
0/1 vector with size 6  and the number of '1''s.  '1' means chosen.

"routing_not_tight_wtp.txt" is the file to store all the wiretap patterns
where routing bound != Shannon bound. The first number  is the  number of such wiretap patterns. Each line is a single
wiretap pattern. For each line, it is leading by an integer $n$ which is the number of wiretap sets
in the wiretap pattern. After n, there are n integers which are the indices of wiretap sets 
corresponding to wiretap sets in "wiretapset.txt"