@SuppressWarnings("unused")
	private boolean isConnected(int x1, int y1, int x2, int y2) {
		if (x1-1 == x2 || x1 == x2 || x1+1 == x2)
			if (y1-1 == y2 || y1 == y2 || y1+1 == y2)
				return true;
		return false;
	}