public String toString() {
		String s = "";
		s += "     0  1  2  3  4  5  6  7  8\n";
		s += "  -------------------------------\n";
		for (int row = 0; row < 9; row++) {
			s += row + " - ";
			for (int col = 0; col < 9; col++) {
				s += " " + get(row, col) + " ";
			}
			s += " - \n";
		}
		s += "  -------------------------------\n";
		return s;
	}