import TypeA;
import TypeAA;
import TypeB;

public class Equiv {
	public static void main(String [] args) {
            TypeA obj1 = new TypeA();
	    TypeB obj2 = new TypeB();	
	    TypeA obj3 = new TypeA();
	    TypeAA obj4 = new TypeAA();

            // obj1 = obj2;
            obj1 = obj3;
	    obj3 = obj4;
            obj4 = obj3;
	 }
}