public class Lab3{
	private Display disp;

	Lab3(){
		disp = new Display();
	}

	public int start(){
		for(int i = 0; i< 10; i++){
			
			DisplayThread dt1 = new DisplayThread(disp, "ab");			
			DisplayThread dt2 = new DisplayThread(disp, "cd\n");			

			dt1.start();
			dt2.start();

			try{
				dt1.join();
				dt2.join();
			}
			catch(Exception e){return -1;}
		}
		return 0;
	}	
	

	public static void main(String[] argv){
		Lab3 lab = new Lab3();
		System.exit(lab.start());
	}
}