X     XX     XX     XX      X             X             X      X                           X      X     XX            XX    XXXX    XX     XX     XX     XX     XX     XX     XXX    XX     XX     XX     XX     XX     XX     XX
X_____XX_____XX_____XX______X_____________X_____________X______X___________________________X______X_____XX____________XX____XXXX____XX_____XX_____XX_____XX_____XX_____XX_____XXX____XX_____XX_____XX_____XX_____XX_____XX_____XX