XX     XX     XX     XX     XX     XX     XX     XX     XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    X
XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX
___XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____X____________XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX