text: #include <iostream>
  #include <sstream>
  using namespace std;
  
  #define STRINGIFY(x) #x
  #define TOSTRING(x) STRINGIFY(x)
  
  
  struct Student
  {
      void set_age(int _age){age=_age;}
      void set_standard(int _standard){standard=_standard;}
      void set_first_name(string _age){first_name=_age;}
      void set_last_name(string _age){last_name=_age;}
  
  
      int get_age(){return age;}
      int get_standard(){return standard;}
      string get_first_name(){return first_name;}
      string get_last_name(){return last_name;}
  
      string to_string(){
          return std::to_string(age)+","
          + first_name+","+last_name+","
          +std::to_string(standard);
      }
  
      int age, standard;
      string first_name, last_name;
  };
  /*
  Enter code for class Student here.
  Read statement for specification.
  */
  
  int main() {
      int age, standard;
      string first_name, last_name;
      
      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);
      
      cout << st.get_age() << "\n";
      cout << st.get_last_name() << ", " << st.get_first_name() << "\n";
      cout << st.get_standard() << "\n";
      cout << "\n";
      cout << st.to_string();
      
      return 0;
  }
  
  