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