#include <iostream>

class Base {
public:
    void imprimir() {std::cout << "Base!" << '\n';};
};

class Derivada1 : protected Base {};

class Derivada2 : public Derivada1 {
public:
    void imprimir_aux() {
        imprimir();
    };
};

int main() {
    Derivada2 d;
    d.imprimir_aux();
    return 0;
}