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XX     XX     XX     XX                                                                            X      X      X
______X____________X______XX___________________X______X______X_______X_____XX_____X______XX_____XX____________XX_____XX______X_____XX_____X______XX_____X_____________XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XXXX_____XX_____XX_____XX____________________________________________________________________________X______X______