n1 n2 1 n2 np1 1 n1 np1 1 n1 n1 5 j ng1 1 np1 crd 1 j n2 2 n1 j 4 av-j j 1 crd j 1 j j 5 n2 n2 1 n2 n1 2 j n1 5 np1 j 2 ng1 n1 1 n1 av-j 1