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