| 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 8, and the edges are: (8,6) (0,8) (8,4) (0,2) (5,6) (7,3) (7,8) (2,4) (6,7) (5,1) (4,1) (8,1) (3,4) (7,4) (0,3) (3,6) (0,6). |