X     XX     XX     XX     XX     XX     XX     XX                                                             XX     XX    XXXX    XX     XX     XX     XX          X XX     XXX    XX     XX     XX     XX                   XX     XXX    XX     XX
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X_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____________________________________________________________XX_____XX____XXXX____XX_____XX_____XX_____XX__________X_XX_____XXX____XX_____XX_____XX_____XX___________________XX_____XXX____XX_____XX________XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____