av-j n1 2 n1 n2 1 n1 n1 12 j j 1 np1 crd 1 n1 av-j 4 crd n1 1 n1 j 1 av-j j 3 n2 av-j 2 n2 n2 1 j n1 2 n2 jc 1 j n2 2 jc n1 1