digraph finite_state_machine {
    rankdir=LR;
    //size="4,2";
    fontpath="/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType";
    node [fontsize="14" fontname="sazanami-gothic.ttf"];
    edge [fontsize="7" fontname="sazanami-gothic.ttf"];
    "" [shape="none"];
    "" -> a;
    a -> b [ label = "A/AAA" ];
    b -> a [ label = "B/BBB" ];
}
