class X {
public:
  X(int p) : fx(p) {}
  int fx;
};

class Y {
public:
  Y(int p) : fy(p) {}
  int fy;
};

class B : public virtual X,public Y {
public:
  B(int p) : X(p-1),Y(p-2){}
};

class C : public virtual X,public Y {
public:
  C(int p) : X(p+1),Y(p+1){}
};

class D : public B, public C {
public:
  D(int p) : X(p-1), B(p-2), C(p+1){}
};

int main() {
  D* d = new D(5);
  B* b = d;
  C* c = d;
  std::cout << b->fx << b->fy
            << c->fx << c->fy;
  return 0;
}

// What is the output of running the program?