EQ2EMu/EQ2/source/depends/boost_1_72_0/libs/graph/test/planar_input_graphs/planar_K_4_e_5_p9.dimacs

p edge 9 11
e 0 6
e 0 2
e 2 4
e 3 5
e 3 4
e 4 1
e 6 7
e 7 5
e 7 1
e 8 5
e 8 1