ww wr wd -mb 3d e ww wr wd -mb 3d e ww wr wd -mb 3d e ww wr wd -mb 3d e ww wr wd -mb 3d e ww wr wd -mb 3d e ww wr wd -mb 3d e ww wr wd -mb 3d e 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8