public interface Animal
{
  public String getSound();
  public String getType();
}

import java.util.*;
public class Chick implements Animal
{
    private String myType;
    private String mySound1;
    private String mySound2;
    private boolean status;


  Chick()
  {
    myType = "chick";
    mySound1 = "cheep";
    mySound2 = "cluck";
    status=true;

  }

  Chick(boolean mood)
  {
    myType= "chick";
    mySound2 = "cluck";
    mySound1 = "cheep";
    status=mood;
  }

  public String getSound()
  {
    Random random = new Random();
    int t = random.nextInt(2);
    if(status==true)
        if(t!=0)
            return mySound1;
        return mySound2;
  }

  public String getType()
  {
    return myType;
  }
}

public class Pig implements Animal
{
  private String myType;
  private String mySound;

  Pig()
  {
    myType = "pig";
    mySound = "oink";
  }

  public String getSound()
  {
    return mySound;
  }

  public String getType()
  {
    return myType;
  }
}

public class Cow implements Animal
{
  private String myType;
  private String mySound;

  Cow()
  {
    myType = "cow";
    mySound = "moo";
  }

  public String getSound()
  {
    return mySound;
  }

  public String getType()
  {
    return myType;
  }
}

import java.util.*;
public class NamedCow extends Cow
{
    private String myName;


    NamedCow(String name)
    {
        super();
        myName=name;

    }

    public String getName()
    {
        return myName;
    }
}

import java.util.*;
public class Farm
{
   private ArrayList <Animal> myFarm;

   public Farm()
   {
      myFarm = new ArrayList <Animal>();
      myFarm.add(new Cow());
      myFarm.add(new Chick(true));
      myFarm.add(new Pig());
      myFarm.add(new NamedCow("Elsie"));
   }

   public void animalSounds()
   {
      Animal temp;
      for(int i = 0; i < myFarm.size(); i++)
      {
         temp = myFarm.get(i);
         System.out.println(temp.getType() + " goes " + temp.getSound());
      }

      NamedCow named = (NamedCow)myFarm.get(4);
      System.out.println(named.getName());
   }
}

public class OldMacDonald
{
  public static void main(String[] args)
  {
    Farm farm = new Farm();
    farm.animalSounds();



  }
}