/* ex_5_1.c++ */
#include <iostream>
using namespace std;

class A {
protected:
	int a;
public:
	A() { cout << "A : " << a << endl; };
	void fait_a() { cout << "a" << endl; }
};

class B {
protected:
	int b;
public:
	B() { cout << "B : " << b << endl; };
	void fait_b() { cout << "b" << endl; }
};

class F : public A, public B {
public:
	F();
};

F::F() {
	cout << "F : " << a << " " << b << endl;
}


int main (void) {
	F f;
	f.fait_a();
	f.fait_b();
	return 0;
}