| 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: (7,8) (2,0) (6,8) (0,5) (6,7) (3,1) (3,5) (6,0) (1,4) (2,1) (2,3) (2,6) (4,0) (6,3) (8,3) (2,4) (6,1) (1,8). |