# comments, blank lines, tabs, CRLF, signs, timestamps, duplicates, self-loops
% another comment

   # an indented comment
10 20 5
10	20	3
+10,20,3
20 10 -7
  -5 10
10 -5 2
7 7 1
7 30
30 7 0
1000000000000 10
10 1000000000000 9
30,40
40 30
40	30	11

