import java.io.*;
import java.util.*;
import edu.neu.ccs.demeter.dj.*;
class A {
	private B b;
	public A(B bin) {
		b=bin;
		}
	
}
class B {
	private D d;
	private C c;
	public B(C cin,D din) {
		c=cin;
		d=din;
		}
	
}
class C {
	
}
class D {
	private X x;
	public D(X xin) {
		x=xin;
		}
	
}
class X {
	private String name;
	public X(String s) {
		name=s;
		}
	public void printName(){
		System.out.println(name);
		}
}
public class Demo {
	public static void main(String[]argv){
		A a=new A(new B(new C(),new D(new X("DJC"))));
		ClassGraph cg=new ClassGraph(true,false);
		X x=(X)new TraversalGraph("{A -> X}",cg).fetch(a);
		x.printName();
		}
}