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using System;

class Animal
{
    string species;

    public Animal(string species)
    {
        this.species = species;
    }

    public void Eat()
    {
        Console.WriteLine("The animal is eating.");
    }
}

class Dog : Animal
{
    string breed;

    public Dog(string species, string breed) : ___
    {
        this.breed = breed;
    }

    public void Bark()
    {
        Console.WriteLine("Woof! Woof!");
    }
}

class GermanShepherd : Dog
{
    public GermanShepherd(string species, string breed) : ___
    {
        Console.WriteLine("GermanShepherd Object Created");
    }

    public void PerformGuardDuty()
    {
        Console.WriteLine("The German Shepherd is performing guard duty.");
    }
}


class ConsoleApp
{
    static void Main()
    {
        new GermanShepherd("Canis lupus familiaris", "German Shepherd");
    }
}