struct A { void ohai() {} };

struct B: protected A {};

struct C: private A { friend int main();};

struct D: B { void test() { ohai();} };

struct E: C { void test() { ohai();} };

int main() {
    A().ohai();
    B().ohai();
    C().ohai();
    D().ohai();    
    return 0;
}