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