X     XX     XX     XX     XX     XX     XX                   X                     X     XX            XX            XX    XXXX    XX     XX     XX     XX     XX   X XX     XXX    XX
X_____XX_____XX_____XX_____XX_____XX_____XX___________________X_____________________X_____XX____________XX____________XX____XXXX____XX_____XX_____XX_____XX_____XX___X_XX_____XXX____XX