digraph String { node [shape = circle, height = 0.6, fontname = "monospace", fixedsize = true, fontsize = 12]; edge [fontname = "monospace", fontsize = 12]; node [shape = circle]; START; L; Q; node [style = filled]; QQ; START -> L [label = "L"]; START -> Q [label = "\\\""]; L -> Q [label = "\\\""]; Q -> Q [label = ""]; Q -> QQ [label = "\\\""]; }