digraph {e""[e=d]Dc[l=""]Noe[l=""]Df[l=""]Da[l=""][l=""]Da[l=""][l=""][l=""]e->l->e->e
Da->Da
Da->Df
Da->Df
Da->Noe
Df->Noe
Df->Df->l->Noe->Df->l->
De->n->Df
Noe->De ->  W ;
W ->  EE ;
ee ->  W ;
}