XXX    X X    X X    XXX    X      X      X      X      XX     XXX    XXX    XXX    XXX    XXX           XX     XXX    XXX    XX     XX     XX                  XXXX    XXXX   XXX    XX     XX     XXX    XXX    XXX    XX     XXXX   XXX    XXX
XXX    XXX    XXX    XXX    XXX    XXX    XX     XX     XXX    XXX    XXX    XXX    XXX    XXX    XXX    XX     XX
_____XXX____X_X____X_X____XXX____X______X______X______X______XX_____XXX____XXX____XXX____XXX____XXX___________XX_____XXX____XXX____XX_____XX_____XX__________________XXXX____XXXX___XXX____XX_____XX_____XXX____XXX____XXX____XX_____XXXX___XXX____XXXXXX____XXX____XXX____XXX____XXX____XXX____XX_____XX_____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XX_____X