class A
{
    int a; String b;
    void input()
    {
        System.out.println("enter your roll no and name ");
    }
    
      
    
    
}
class B extends A
{
    void D()
    {
        a=10; b="om";
        System.out.println(a+" "+b);
    }
    public static void main(String[] args){
    B r=new B();
    r.input(); 
    r.D(); 
    }
    
}