class PencilA {
    private String defaultColor = "black";
    private String color; /*one of "black", "red", or "blue"*/
    private int length;

    private boolean isValid (String colorToCheck) {
	return (colorToCheck.equals("black") ||
		colorToCheck.equals("red")   ||
		colorToCheck.equals("blue")    );
    }
		
    public PencilA (String c, int l) {
	if (isValid(c)) {
	    color = c;
	}
	else {
	    color = defaultColor;
	}
	length = l;
    }

    public String toString () {
	return (length + ": " + color);
    }

    public void setColor (String newColor) {
	if (isValid(newColor)) {
	    color = newColor;
	}
    }
}