#include 

using namespace std;
class A {
public:
    A() {
        cout << "A constructor" << endl;
    }
};
class B {
public:
    B() {
        cout << "B constructor" << endl;
    }
};
class C : public B, public A {
public:
    C() {
        cout << "C constructor" << endl;
    }
};
int main() {
    C c;
    
    return 0;
}