public void running() throws IllegalArgumentException, IOException, UnsupportedAudioFileException, ProgramEndedException
	{
		System.out.print("Ist-Satz:");
		
		while(true){
			try{
				switch(nextState)
				{
				case 1: s1();
						break;
				case 2: s2();
						break;
				case 3: s3();
						break;
				case 4: s4();
						break;
				}	
			}
			catch(IOException e)
			{
				throw new ProgramEndedException();
			}
		}		
	}