X    XXX    X X    XXX    XXX    XXX    XXX XXX    X  XX     XX     XX     XX     XX     XX     XX     XX     XX      X     XXX    XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX
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_______X____XXX____X_X____XXX____XXX____XXX____XXX_XXX____X__XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX______X_____XXX____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