X     XX                   XX     XX     XX     XX     XX     XX      X      X      X      X     XX     XX     XX     XX     XX                   XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX
X_____XX___________________XX_____XX_____XX_____XX_____XX_____XX______X______X______X______X_____XX_____XX_____XX_____XX_____XX___________________XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX