include

include

using namespace std;

class Student { private: int age; int standard; string first_name; string last_name;

public: void input() { cin >> age >> first_name >> last_name >> standard; }

void answer() {
    cout<<age<<endl;
    cout<<last_name<<", "<<first_name<<endl;
    cout<<standard<<endl<<endl;
    cout << age << "," << first_name << "," << last_name << "," << standard;
}

};

int main() { Student st; st.input(); st.answer(); return 0; }