digraph example8b { rankdir="LR"; node [texmode="math",shape="circle",style="state"]; q0 [style="state,initial",label="0"]; q1 [style="state",label="1"]; q2 [style="state",label="2"]; q3 [style="state,final",label="3"]; edge [texmode="math",lblstyle="auto"]; q0 -> q1 [label="a"]; q1 -> q1 [label="a",topath="loop above"]; q0 -> q2 [label="b"]; q0 -> q3 [label="c"]; q1 -> q3 [label="c"]; q2 -> q3 [label="c"]; }