#include <iostream>
using namespace std;

class A {
	int i;
public:
	A(const int i = 0) :i(i)	{ cout << "kA"; }
	A(const A& a) :i(a.i)		{ cout << "cA"; }
	void operator=(const A& a)	{ f(a); cout << "eA"; }
	virtual void f(const A& a)	{ cout << "fA"; }
	virtual ~A()				{ cout << "A"; }
};

class B {
	A a;
public:
	B()						{ cout << "kB"; }
	B(const B& b) :a(b.a)	{ cout << "cB"; }
	~B()					{ cout << "B"; }
};

int main()
{
	A a(5);		cout << '\n';	//kA
	B b;		cout << '\n';	//kAkB
	B b1 = b;	cout << '\n';	//cAcB
	b = b1;		cout << '\n';	//fAeA
	return 0;					//BABAA
}