// implement threads

class Data extends Thread {
    int k;
    Data(int k) {
	this.k = k;
    } // constructor Data
    public void run() {
	for(int i=1;i<=10;i++)
	    System.out.print(k);
    } // method run
} // class Data

public class thread1 {
    
    public static void main(String args[]) {
	
	Data a = new Data(1);
	Data b = new Data(2);
	a.start();
	b.start();
    }

}

/* Output should mix up the order of 1s and 2s */