X     XX     XX     XX     XX     XX     XX     XX     XX            XX     XX     XX     XX            XX     XX     XX    XXXX    XX     XX     XX     XX     XX   X XX      XX    XX
XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     X
X_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX____________XX_____XX_____XX_____XX____________XX_____XX_____XX____XXXX____XX_____XX_____XX_____XX_____XX___X_XX______XX____XX_______________XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____