X     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX    XXXX    XX     X
XX     XX     XX     XX     XX     X
X_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX____XXXX____XX_____X______________________________________________________________________________XX_____XX_____XX_____XX_____XX_____