static String filterGetallenReeks(String reeks) {
		for(int i = 0; i < reeks.length(); i++) {
			char temp = reeks.charAt(i);
			String temp2 = Character.toString(temp);

			if(reeks.charAt(i) > 31 && reeks.charAt(i) < 48)
				reeks = reeks.replace(temp2," ");
			else if(reeks.charAt(i) > 57 && reeks.charAt(i) < 127)
				reeks = reeks.replace(temp2," ");
		}

		for(int i = 0; i < reeks.length(); i++)
				reeks = reeks.replace(" ","");

		System.out.println("Gefilterde invoer: " + reeks);

		return reeks;
	}