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