1digraph { 2 edge [ len=1.8 ]; 3 0 [ pos="148,246z" ]; 4 1 [ pos="255,30" ]; 5 2 [ pos="148,138" ]; 6 3 [ pos="41,138" ]; 7 1 -> 0 [ label="5" ]; 8 1 -> 2 [ label="3" ]; 9 2 -> 3 [ label="8" ]; 10 3 -> 0 [ headlabel="3", labeldistance=4.5, labelangle=0.2854 ]; 11 0 -> 3 [ headlabel="1", labeldistance=4.5, labelangle=-0.2854 ]; 12 3 -> 1 [ label="2", len=2.8 ]; 13}