#include <iostream>

class B1
{
    public:
    B1(){ std::cout << "B1 Constructor" << "\n";}
    ~B1() { std::cout << "B1 Destructor" << "\n";}
};

class B2
{
    public:
    B2(){ std::cout << "B2 Constructor" << "\n";}
    ~B2() { std::cout << "B2 Destructor" << "\n";}
};

class C1 : public B1
{
    public:
    C1(){ std::cout << "C1 Constructor" << "\n";}
    ~C1() { std::cout << "C1 Destructor" << "\n";}
};

class C2 : public B2
{
    public:
    C2(){ std::cout << "C2 Constructor" << "\n";}
    ~C2() { std::cout << "C2 Destructor" << "\n";}
    B1 x;
};

class D : public C1,C2
{
    public:
    D(){ std::cout << "D Constructor" << "\n";}
    ~D() { std::cout << "D Destructor" << "\n";}
};

int main()
{
    B1 *a = new D;
    delete a;
}