graph G {
    compound="true"
    rankdir="TB"
    bgcolor="white"
    fontname="Tahoma"

    node [
        fixedsize="false"
        fontname="Tahoma"
        color="white"
        fillcolor="deepskyblue2"
        fontcolor="black"
        shape="box"
        style="filled"
        penwidth="1.0"
    ]
    edge [
        fontname="Arial"
        color="#00688b"
        fontcolor="black"
        fontsize="12"
        arrowsize="0.5"
        penwidth="1.0"
    ]




    "core" -- "core" [label=" 40 ", penwidth="10", color="#a0a0a0FF"];
    "hcp" -- "hcp" [label=" 10 ", penwidth="2", color="#a0a0a070"];
    "ROOT" -- "core" [label=" 7 ", penwidth="1", color="#00688b5E"];
    "core" -- "hcp" [label=" 4 ", penwidth="1", color="#00688b5E"];
    "ROOT" -- "hcp" [label=" 2 ", penwidth="1", color="#00688b4C"];

}