[. . . ] [. . . ] SD-(1)-a SD-(1)-b SD-(1)-c SD-(1)-d SD-(1)-a SD-(1)-b SD-(1)-c SD-(1)-d SD-(2)-a SD-(2)-b SD-(2)-c SD-(2)-d SD-(2)-a SD-(2)-b SD-(2)-c SD-(2)-d SD-(3)-a SD-(3)-b SD-(3)-c SD-(3)-d SD-(3)-a SD-(3)-b SD-(3)-c SD-(3)-d SD-(4)-a SD-(4)-b SD-(4)-c SD-(4)-d SD-(4)-a SD-(4)-b SD-(4)-c SD-(4)-d [. . . ] [. . . ]