| Ww WW | WW WW | Ww WW | Ww Ww w | wW wW | ww ww w | wW ww | ww wW | ww wW | wW wW | ww ww ------+--------+--------+--------+-------- wW w | w w ------+--------+--------+--------+-------- WW W | WW WW | WW WW | WW WW | Ww WW | WW Ww | Ww WW | Ww WW | WW Ww w | w W | WW WW | Ww Ww w | w W | WW WW | WW Ww w |