n1 n2 1 n1 j-jn 3 n1 n1 9 n2 n1 4 n1 ng1 2 np1 crd 1 j n2 1 n1 jc 1 crd n1 1 n1 j 3 n1 n-jn 1 j-jn n2 1 j-jn n1 2 jc n2 1 j n1 2 n-jn n1 1 ng1 n1 2 n1 js 1 js n1 1