X     XX     X      X      XX     XX     XX                                         X     XX            XX            XX    XXXX    XX     XX     XX     XX     XX   X XX     XXX    XX
X_____XX_____X______X______XX_____XX_____XX_________________________________________X_____XX____________XX____________XX____XXXX____XX_____XX_____XX_____XX_____XX___X_XX_____XXX____XX