X     XX     XX     XX     XX            X      X      X      X      XX     XX            XX     XX            XX     XX    XXXX    XX     XX     XX                 X XX     XXX    XX     XX      X     XX     XX     XX     XX     XXX    XX     XX
XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     X
X_____XX_____XX_____XX_____XX____________X______X______X______X______XX_____XX____________XX_____XX____________XX_____XX____XXXX____XX_____XX_____XX_________________X_XX_____XXX____XX_____XX______X_____XX_____XX_____XX_____XX_____XXX____XX_____XX_XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____