digraph {
  edge [ len=1.8 ];
  0 [ pos="148,246z" ];
  1 [ pos="255,30" ];
  2 [ pos="148,138" ];
  3 [ pos="41,138" ];
  1 -> 0 [ label="5" ];
  1 -> 2 [ label="3" ];
  2 -> 3 [ label="8" ];
  3 -> 0 [ headlabel="3", labeldistance=4.5, labelangle=0.2854 ];
  0 -> 3 [ headlabel="1", labeldistance=4.5, labelangle=-0.2854 ];
  3 -> 1 [ label="2", len=2.8 ];
}