#include <iostream>

struct V {
  int x = 9;
};

struct W{
  int y = 8;
};

struct A : virtual V{
  int x = 10;
  int y = 7;
};

struct B : virtual V, virtual W{

};

struct D : A, B {

};

int main() {
  D d;
  std::cout << d.x << d.y;

  return 0;
}