#include <iostream>
#include <sstream>
#include <string>

class Student{
    private:
        int age;
        std::string first_name;
        std::string last_name;
        int standard;
    public:
        void set_age(int value){
            age = value;
        }
        int get_age() const {
            return age;
        }
        void set_standard(int value){
            standard = value;
        }
        int get_standard() const {
            return standard;
        }
        void set_first_name(std::string value){
            first_name = value;
        }
        std::string get_first_name() const {
            return first_name;
        }
        void set_last_name(std::string value){
            last_name = value;
        }
        std::string get_last_name() const {
            return last_name;
        }
        std::string to_string() const {
            std::ostringstream os;
            os << age << "," << first_name << "," << last_name << "," << standard << std::endl;
            return os.str();
        }
};

int main() {
    int age, standard;
    std::string first_name, last_name;
    
    std::cin >> age >> first_name >> last_name >> standard;
    
    Student st;
    st.set_age(age);
    st.set_standard(standard);
    st.set_first_name(first_name);
    st.set_last_name(last_name);
    
    std::cout << st.get_age() << "\n";
    std::cout << st.get_last_name() << ", " << st.get_first_name() << "\n";
    std::cout << st.get_standard() << "\n";
    std::cout << "\n";
    std::cout << st.to_string();
    
    return 0;
}