XX             X     XX     XX     XX     XX     XX     XX     XX     XX      X      X      X     XX     XX      X     XXX    XX     XX     XX     XX     XX   X XX     XXX     X     XX     XX     XX     XX     XX     XX     XXX    XX     XX
XX      X      X     XX     XX     XX      X     XX     XX     XX     XX     XX     XX     XX     XX     XX     X
______XX_____________X_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX______X______X______X_____XX_____XX______X_____XXX____XX_____XX_____XX_____XX_____XX___X_XX_____XXX_____X_____XX_____XX_____XX_____XX_____XX_____XX_____XXX____XX_____XX_XX______X______X_____XX_____XX_____XX______X_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____