What will be the output of the program?

 public class ThreadDemo 
 {    
     private int count = 1;   
     public synchronized void doSomething()    
     {        
         for (int i = 0; i 10; i++)                         
             System.out.println(count++);      }    
public static void main(String[] args)      {       
     ThreadDemo demo = new ThreadDemo();             
     Thread a1 = new A(demo);          
     Thread a2 = new A(demo);          
     a1.start();  
     a2.start();  
    } 
  }
  class A extends Thread
  {
      ThreadDemo demo;   
      public A(ThreadDemo td)    
      {      
         demo = td;  
      }      
      public void run()     
      {       
         demo.doSomething();    
      }      
   }