digraph G {
size="6,6";
a -> b -> c;
subgraph cluster0 {
x0 -> y0;
x0 -> z0;
}
subgraph cluster1 {
x1 -> y1;
x1 -> z1;
}
subgraph cluster2 {
x2 -> y2;
x2 -> z2;
}
a -> x0;
b -> x1;
b -> x2;
a -> z2;
c -> z1;
}
digraph G {
size="6,6";
a -> b -> c;
subgraph cluster0 {
x0 -> y0;
x0 -> z0;
}
subgraph cluster1 {
x1 -> y1;
x1 -> z1;
}
subgraph cluster2 {
x2 -> y2;
x2 -> z2;
}
a -> x0;
b -> x1;
b -> x2;
a -> z2;
c -> z1;
}