notes/school/di-ma/20181106_1-weg_pfad_kreis.dot

graph g {
    node [ shape="circle" ];
    {
        rank="same";
        1;
        2;
    }

    {
        rank="same";
        3;
        4;
    }

    1 -- 2;
    1 -- 3;
    1 -- 4;
    2 -- 4;
}