#include <iostream>
using namespace std;
class A {
    public:
    A() {
        cout << "A";
    }
    ~A() {
        cout << "~A";
    }
};
class B : public A {
    public:
    B() {
        cout << "B";
    }
    ~B() {
        cout << "~B";
    }
};
int main() {
    B b;
    return 0;
}