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

public class MyVisitor extends Visitor {
  public void start() { System.out.println("begin"); }
  public void finish() { System.out.println("end"); }

  public void before(A o) { System.out.println("before A"); }
  public void after(A o)  { System.out.println("after A"); }

  public void before(B o) { System.out.println("before B"); }
  public void after(B o)  { System.out.println("after B"); }

  public void before(C o) { System.out.println("before C"); }
  public void after(C o)  { System.out.println("after C"); }

  public void before(D o) { System.out.println("before D"); }
  public void after(D o)  { System.out.println("after D"); }

  public void before(E o) { System.out.println("before E"); }
  public void after(E o)  { System.out.println("after E"); }

  public void before(F o) { System.out.println("before F"); }
  public void after(F o)  { System.out.println("after F"); }

  public void before(G o) { System.out.println("before G: " + o.s); }
  public void after(G o)  { System.out.println("after G: " + o.s); }
}