public int stringY(String str)
	{
		if (str == null || str.length() == 0)
			return 0;

		int y = 0;
		int length = str.length();
		for (int i = 0; i != length; ++i)
		{
			int y0 = charY(str.charAt(i));
			if (y > y0)
				y = y0;

		}

		return y;
	}