import java.io.*;

class ThreadDemo {
	ThreadDemo() {
		new MyThread().start();
		new MyThread().start();
		new MyThread().start();
		new MyThread().start();
		new MyThread().start();
		new MyThread().start();
		new MyThread().start();
		new MyThread().start();
		new MyThread().start();
		new MyThread().start();
	}

	class MyThread extends Thread {
		public void run() {
			while (true) 
				System.out.print(Thread.currentThread().getName() + ": " + i++ + "   ");
		}
		int i;
	}

	public static void main(String [] args) {
		new ThreadDemo();
	}
}