3 node [fontsize=10,height="0.1", width="0.1"];
5 c1 [label="c1",shape=box];
6 rule3 [label="rule3\nnextnodes"];
7 rule2 [label="rule2\nNodes"];
8 rule2 -> rule3 [label=""];
9 rule2 -> c1 [label=""];
10 rule1 [label="rule1\nNodes"];
11 rule1 -> rule2 [label=""];
12 rule1 -> rule3 [label=""];
13 rule1 -> c1 [label=""];