public static class Mediator
{

    public void Run()
    {
        Brain humman = new Brain();
    }

}


class Brain
{
    public Brain()
    {
        CreateBodyPrts();
    }

public static void CreateBodyPrts()
{
     Ear = new Ear(this);
     Hand = new Hand(this);
     Eye = new Eye(this);
}

public Ear   Ear{get; private set;}
public Hand  Hand{get; private set;}
public Eye   Eye{get; private set;}

public void SomethingHappendToBodyParts(BodyPart bodyPart)
{
    if(bodyPart is Ear)
    {
        string hearSounds = ((Ear)bodyPart).getSounds();
        if(hearSounds.Contains("hallo"))
        {
            Hand.WaveHand();
        }
    }
    if(bodyPart is Eye)
    {
        string seeSomething = ((Eye)bodyPart).HearSomething();

    }

}

}





class BodyPart
{
    private readonly Brain _brain;

    BodyPart(Brain brain)
    {
        _brain = brain;
    }

    public void Changed()
    {
        _brain.SomethingHappendToBodyParts(this);
    }

}

class Hand :BodyPart
{
    public Hand(Brain brain) : base(brain){}

    public void WaveHand()
    {
        Console.Writeline("My hand is waving.");
    }
}


class Ear : BodyPart
{
    private string _sounds = string.Empty;

    Ear(Brain brain) : base(brain){}

    public string getSounds()
    {
        return _sounds;
    }

    public void HearSomething()
    {
        Console.Writeline("Що ти чуєш?");
        _sounds = Console.ReadLine();
        Changed();
    }

}


class Eye : BodyPart
{
    private string whatISee = string.Empty;

    public void SeeSomething()
    {
        Console.Writeline("Що ти бачиш?");
        whatISee = Console.ReadLine();
        Changed();
    }

    public string GetWhatISee()
    {
        return whatISee;
    }
}