av-j n1 2 n1 n2 2 n1 n1 2 n2 av-jn 1 n2 av-j 1 n1 ng1 2 np1 crd 1 n1 av-j 1 crd ng1 1 ng1 n1 3 j np1 1 j j 1 n2 n1 4 j n1 4 j n2 3 n1 j 8 np1 n2 1