n1 n2 3 av-j n1 1 j j 1 n1 n1 6 n2 n1 1 j ng2 1 np1 crd 1 j n2 2 ng2 n2 1 crd j 1 n2 av-j 1 n2 n2 2 n2 j 4 j n1 7 n1 j 5