import EDU.neu.ccs.demeter.dj.*;

class Main {
  public static void main(String[] args) {    
    ClassGraph cg = new ClassGraph(false, true);
    A a = new A(new C(new D("SUC")));

    //System.out.println(cg);
    System.out.print(cg.fetch(new B(), new Strategy("{S -> T}")));
    //System.out.print(cg.fetch(a, new Strategy("{A -> D}")));
    System.out.println();
  }
}