*Vertices   11
  1 "m1"
  2 "pm"
  3 "m2"
  4 "m3"
  5 "m4"
  6 "m5"
  7 "m6"
  8 "m7"
  9 "a1"
 10 "a2"
 11 "a3"
*Arcs
  1  2
  1  6
  3  2
  3  4
  3  6
  3  7
  3  8
  5  2
  5  4
  5  7
  5  8
  6  2
  6  4
  6  7
  6  8
  7 11
  9  4
  9  8
 10  1
 10  3
 10  4
 10  5
 11  6
*Edges
  1  3
  4  7
  4  8
  5  6
  7  8
  2  8
  7  9
  8 11
  9 11