using System;

public class A { public A() {Console.Write("A");}}

public class B: A 

{

  public class C: A {static C() {Console.Write("C");}}

  public B() :base() {Console.Write("B");}

  private C c = new C();

}

public class Z

{

  static Z() {Console.Write("Z");}

  public static void  Main() {B b= new B(); Console.Write(";");}

}