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();

}
}