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