digraph process_order {
d_eval3 -> g_eval2
g_eval2 -> g_eval1
g_eval1 -> h_eval1
h_eval1 -> b_eval1
b_eval1 -> d_eval2
d_eval2 -> e_eval1
e_eval1 -> f_eval1
f_eval1 -> b_eval2
b_eval2 -> c_eval1
c_eval1 -> d_eval1
}