#include <cstdio>
#include <iostream>
using namespace std;

class A
{
public:
    A() { cout << 1; }
    ~A() { cout << 2; }
};

class B
{
public:
    B() { cout << 3; }
    ~B() { cout << 4; }
protected:
    A m_member1;
};

class C : public B
{
public:
    C() { cout << 5; }
    ~C() { cout << 6; }
private:
    A m_member2;
};

int main()
{
    C c;  // output: 13156242
    return 0;
}