Graph 1, order 8. 8 8 1 5 1 6 2 5 2 6 3 7 3 8 4 7 4 8 Graph 2, order 8. 8 8 1 5 1 6 2 5 2 7 3 6 3 8 4 7 4 8 Graph 3, order 8. 8 8 1 4 1 6 2 5 2 7 3 7 3 8 4 6 5 8