| In an undirected graph, (i,j) means that node i and node j are connected with an undirected edge. | |
| The nodes are numbered from 0 to 17, and the edges are: (0,2) (0,13) (1,15) (1,14) (1,13) (2,5) (2,4) (4,15) (4,13) (5,14) (5,9) (5,13) (6,7) (6,12) (9,14) (10,16) (11,16) (12,17). |