class ta extends Thread{ 
public void run(){ 
for(int i=1;i<=10;i++) { 
	try	{ 
    System.out.print(i); 
	Thread.sleep(10); // milisecond 
	}catch (InterruptedException e)	{	} 
} 
} 
} 
class tb extends Thread{ 
public void run(){ 
for(int i=1;i<=10;i++) { 
	try	{ 
    System.out.println(i); 
	Thread.sleep(20); // milisecond 
	}catch (InterruptedException e)	{	} 
} 
} 
} 
class tc extends Thread{ 
public static void main(String a[]){ 
	ta xta = new ta(); 
	xta.start(); 
	tb xtb = new tb(); 
	xtb.start();	 
} 
}
 
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