#include <iostream>


using namespace std;
class Vehicle {
public:
    Vehicle() {
        cout << "Vehicle" << endl;
    }
};
class four_wheels : public Vehicle {
public:
    four_wheels() : Vehicle() {
        cout << "Four wheels" << endl;
    }
};
class Car : public four_wheels {
public:
    Car() : four_wheels() {
        cout << "Car" << endl;
    }
};
int main()
{

    Car c;
    return 0;
}