Licensing

This work is ineligible for copyright and therefore in the public domain because it consists entirely of information that is common property and contains no original authorship.

Source

Created using the following dot source code:

digraph G {
   node [shape=circle]
   nodesep=.8
   7
   5
   3
   11
   8
   2
   9
   10

   7->11
   7->8
   5->11
   3->8
   3->10
   11->2
   11->9
   11->10
   8->9
}