digraph G {
    size="3,5"
    n0 [label="<expression>"];
    n1 [label="<term>"];
    n2 [label="<addop>"];
    n3 [label="<term>"];
    n0 -> n1;
    n0 -> n2;
    n0 -> n3;
    n4 [label="<factor>"];
    n1 -> n4;
    n5 [label="+"];
    n2 -> n5;
    n6 [label="<factor>"];
    n3 -> n6;
    n7 [label="<val>"];
    n4 -> n7;
    n8 [label="<unsigned>"];
    n7 -> n8;
    n9 [label="<digit>"];
    n8 -> n9;
    n10 [label="1"];
    n9 -> n10;
    n11 [label="<val>"];
    n6 -> n11;
    n12 [label="unsigned"];
    n11 -> n12;
    n13 [label="<digit>"];
    n12 -> n13;
    n14 [label="1"];
    n13 -> n14;
}