using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine((new Dog()).ToString());

    }

}

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public class Animal {

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    //Initializing variables

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    private Guid id;

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    private int counter;

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    private string nickname;

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    private int age;

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    private string gender;

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    private string category;

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    private string species;

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    //Constructor

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    public Animal()

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    {

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        this.id = new Guid();

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        this.counter = 0;

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        this.nickname = "";

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        this.age = 0;

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        this.gender = "";

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        this.category = "";

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        this.species = "";

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    }

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    public Animal(Animal other)

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    {

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        this.id = other.id;

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        this.nickname = other.nickname;

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        this.age = other.age;

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        this.gender = other.gender;

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        this.category = other.category;

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        this.species = other.species;

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    }

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    //Properties

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    #region properties

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    public Guid ID

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    {

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        get { return id; }

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        set { id = value; }

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    }

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    public int Counter

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    {

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        get { return counter; }

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        set { counter = value; }

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    }

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    public string Nickname

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    {

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        get { return nickname; }

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        set { nickname = value; }

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    }

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    public int Age

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    {

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        get { return age; }

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        set { age = value; }

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    }

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    public string Gender

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    {

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        get { return gender; }

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        set { gender = value; }

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    }

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    public string Category

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    {

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        get { return category; }

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        set { category = value; }

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    }

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    public string Species

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    {

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        get { return species; }

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        set { species = value; }

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    }

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    #endregion

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    //Overrides

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    public override string ToString()

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    {

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        return String.Format(" {0, -44} {1, -22} {2, 10} {3, 10} {4, 10} {5, 10}", this.id, this.nickname, this.age, this.gender, this.category, this.species);

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    }

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}

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public class Dog : Mammal {

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    //Constructors

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    public Dog() {}

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    public Dog(Animal other) 

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    {

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        this.ID = other.ID;

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        this.Nickname = other.Nickname;

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        this.Age = other.Age;

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        this.Gender = other.Gender;

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        this.Species = "Dog";

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    }

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    public override string ToString()

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    {

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        return String.Format(" {0} {1}", base.ToString(), "+ Doggie");

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    }

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}

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public class Mammal : Animal {

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    //Initializing variables

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    private int teeth;

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    private int tail;

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    //Constructors

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    public Mammal() {}

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    public Mammal(Mammal other) 

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    {

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        this.ID = other.ID; 

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        this.Nickname = other.Nickname;  

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        this.Age = other.Age;  

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        this.Gender = other.Gender; 

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        this.Species = other.Species; 

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        this.Category = "Mammal";

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        this.teeth = other.Teeth;

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        this.tail = other.tail;

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    }

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    #region properties

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    public int Teeth

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    {

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        get { return teeth; }

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        set { teeth = value; }

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    }

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    public int Tail

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    {

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        get { return tail; }

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        set { tail = value; }

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    }

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    #endregion

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    public override string ToString()

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    {

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        return String.Format(" {0} {1}", base.ToString(), "Has " + this.teeth + " teeth");

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    }

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}