static void Main(string[] args)
{
// can be done because is not abstract!!!
Mammal m = new Mammal("Rex");
Dog dog = new Dog("Jamie");
dog.Bark();
// we cannot access protected members
// dog._name = "Joro";
Cat cat = new Cat("Misha");
cat.Meaw();
Human human = new Human("Stanislava");
human.Speak("Hello");
Console.WriteLine("Press any key to continue...");
Console.ReadKey();
}