EQ2EMu/EQ2/source/depends/boost_1_72_0/libs/graph/test/planar_input_graphs/planar_K_4_e_9_p6.dimacs

p edge 13 15
e 1 2
e 1 0
e 3 9
e 4 11
e 4 8
e 5 9
e 5 8
e 6 3
e 6 0
e 10 2
e 10 7
e 11 7
e 11 9
e 12 7
e 12 8