n1 n2 3 av-j av-j 1 n1 n1 6 n1 crd 1 n2 n1 3 np1 crd 1 j n2 1 crd j 1 av-j n2 1 n2 n2 1 n2 j 2 j n1 2 av-j n1 1 n1 av-j 2