#include <iostream>

class Bovine {
 public:
  void speak() { 
	std::cout << "harumph\n"; 
	eat();
  }
  void eat() {
	std::cout << "gulp\n";
  }
};

class Cow : public Bovine {
 public:
  virtual void speak() { 
	std::cout << "moo\n";
	eat();
  }
  virtual void eat() {
	std::cout << "chew\n";
  }
};