digraph test {

    size="7,9.5";
    page="8,10.5";
    ratio=fill;
    rankdir=LR;

    { rank=same;
      node [shape=house];
      A;C;E;G;I;K;M;O;Q;S;U;W;Y;
      node [shape=invhouse];
      B;D;F;H;J;L;N;P;R;T;V;X;Z;
    }

    { rank=same;
      node [shape=parallelogram];
      "Parallelogram" [label="This is a test\nof a multiline\nlabel in an\nparallelogram with approx\nsquare aspect"];
      "a ----- long thin parallelogram";
      "xx" [label="m"];
      "yy" [label="a\nb\nc\nd\ne\nf"];
      node [shape=octagon];
      "Octagon" [label="This is a test\nof a multiline\nlabel in an\noctagon with approx\nsquare aspect"];
      node [shape=parallelogram];
      "Parallelogram" [label="This is a test\nof a multiline\nlabel in an\nparallelogram with approx\nsquare aspect"];
      "a ----- long thin parallelogram";
      "zz" [label="m"];
      "qq" [label="a\nb\nc\nd\ne\nf"];
      ordering=out;
    }

    Parallelogram -> A;
    Parallelogram -> B;
    Parallelogram -> C;
    Parallelogram -> D;
    Parallelogram -> E;
    Parallelogram -> F;
    Parallelogram -> G;
    Parallelogram -> H;
    Parallelogram -> I;
    Parallelogram -> J;
    Parallelogram -> K;
    Parallelogram -> L;
    Parallelogram -> M;
    Parallelogram -> N;
    Parallelogram -> O;
    Parallelogram -> P;
    Parallelogram -> Q;
    Parallelogram -> R;
    Parallelogram -> S;
    Parallelogram -> T;
    Parallelogram -> U;
    Parallelogram -> V;
    Parallelogram -> W;
    Parallelogram -> X;
    Parallelogram -> Y;
    Parallelogram -> Z;

    { rank=same;
      node [shape=triangle];
      a;c;e;g;i;k;m;o;q;s;u;w;y;
      node [shape=tripleoctagon];
      b;d;f;h;j;l;n;p;r;t;v;x;z;
    }

    a -> Parallelogram -> Octagon;
    b -> Parallelogram -> Octagon;
    c -> Parallelogram -> Octagon;
    d -> Parallelogram -> Octagon;
    e -> Parallelogram -> Octagon;
    f -> Parallelogram -> Octagon;
    g -> Parallelogram -> Octagon;
    h -> Parallelogram -> Octagon;
    i -> Parallelogram -> Octagon;
    j -> Parallelogram -> Octagon;
    k -> Parallelogram -> Octagon;
    l -> Parallelogram -> Octagon;
    m -> Parallelogram -> Octagon;
    n -> Parallelogram -> Octagon;
    o -> Parallelogram -> Octagon;
    p -> Parallelogram -> Octagon;
    q -> Parallelogram -> Octagon;
    r -> Parallelogram -> Octagon;
    s -> Parallelogram -> Octagon;
    t -> Parallelogram -> Octagon;
    u -> Parallelogram -> Octagon;
    v -> Parallelogram -> Octagon;
    w -> Parallelogram -> Octagon;
    x -> Parallelogram -> Octagon;
    y -> Parallelogram -> Octagon;
    z -> Parallelogram -> Octagon;
}