public class TwoThreads {
    public static class ThreadAB implements Runnable
    {
    String s;
        private ThreadAB(String string)
        {
        this.s = string;
        }

        public void run()
        {
        System.out.println(s);
        }


    }



	public static void main(String[] args) {
        Runnable run1 = new ThreadAB("A" + "\n" + "B");
        Runnable run2 = new ThreadAB("1" + "\n" + "2");
        Thread Thread1 = new Thread(run1);
        Thread Thread2 = new Thread(run2);
		Thread1.start();
        Thread2.start();
	}

}