case ('\xE4'):
        fn = "auml";
        break;
case ('\xC4'):
        fn = "auml";
        break;
case ('\xF6'):
        fn = "ouml";
        break;
case ('\xD6'):
        fn = "ouml";
        break;
case ('\xFC'):
        fn = "uuml";
        break;
case ('\xDC'):
        fn = "uuml";
        break;
case ('\xDF'):
        fn = "szlig";
        break;