XX     X      X      XX     XX            X  XXXXX        X     X     XX     XX     XX     XX     XX     XX     XX      X     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX
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_____XX_____X______X______XX_____XX____________X__XXXXX________X_____X_____XX_____XX_____XX_____XX_____XX_____XX_____XX______X_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XXXX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____X