X    XXX    XXX    XXX    XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XX     XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    XXX    X X    X X    X X    X X    X X    X X    X X    X X    X X
X X    X X    X X    X X    X X    X X    X X    X X    X X    X X    X X    X X    X X    X X    X X    X X    X
X____XXX____XXX____XXX____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XX_____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____XXX____X_X____X_X____X_X____X_X____X_X____X_X____X_X____X_X____X_XX_X____X_X____X_X____X_X____X_X____X_X____X_X____X_X____X_X____X_X____X_X____X_X____X_X____X_X____X_X____X_X____X