D 0 0 0 B G 0 0 0 0 0 0 D 0 2 0 2 0 2 G D 0 B G 0 0 0 D 0 0 0 G X2 D 0 B 3 0 G 0H2 2H4 4 2 0 0 2 2 2 D 2 2 0 0 0 2 0 G