public static void main(String[] args) {
		  System.out.println("Geben Sie ein Wort ein:");
		  Scanner sc = new Scanner(System.in);
		  String text = sc.next();
		  text.toLowerCase();
	        int count=0;
	        for(int nummer =1; nummer<=6; nummer++){
	        String diphtong = "";

	        switch (nummer) {
			case 1:
				diphtong = "au";
				break;
			case 2:
				diphtong = "ai";
				break;
			case 3:
				diphtong = "äu";
				break;
			case 4:
				diphtong = "ei";
				break;
			case 5:
				diphtong = "eu";
				break;
			default:
				diphtong = "ui";
				break;
			}
	        Pattern pat = Pattern.compile(Pattern.quote(diphtong));
	        Matcher m;
	        for(m = pat.matcher(text); m.find(); count++);
	        System.out.println(count);