EQ2EMu/EQ2/source/depends/boost_1_72_0/libs/graph/test/planar_input_graphs/planar_K_4_e_9.dimacs

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