#ifndef LISTNODE_H
#define LISTNODE_H

#include <iostream>

// Definition of Class ListNode
class ListNode {
protected:  // Each object contains two values
    int data;
    ListNode *link;
public:   // These are the member functions for the Class ListNode
    virtual int whoami() {return 1;}

};
#endif //LISTNODE_H

#ifndef DLISTNODE_H
#define DLISTNODE_H

#include <iostream>

// Definition of Class DListNode
class DListNode : public ListNode {
protected:  // Each object contains two values
    int ddata;
public:   // These are the member functions for the Class DListNode
    int whoami() {return 2;}

};
#endif //DLISTNODE_H

#ifndef SDLISTNODE_H
#define SDLISTNODE_H

#include <iostream>

// Definition of Class SDListNode
class SDListNode  : public DListNode{
protected:  // Each object contains two values
    int sddata;
public:   // These are the member functions for the Class SDListNode
    int whoami() {return 3;}

};
#endif //SDLISTNODE_H


#include <iostream>
#include <string>
 using namespace std;

int main()
{ string oper,cls,phone;
  int i1, i2, i3, num;
  while(1 == 1)
  { cin >> oper;
    cout << oper;
    if (oper == "quit") {// delete everything then
                         exit(0);}
    else if (oper == "insert")
            { cin >> num;
              cout << " " << num;
              cin >> cls;
              cout << " " << cls;
              if (cls == "base") {cin >> i1;
                                  cout << " " << i1;
                                  //take appropriate actions
                                 }
              else if (cls == "der") {cin >> i1 >> i2;
                                  cout << " " << i1 << " " << i2;
                                      //take appropriate actions
                                     }
              else if (cls == "sder") {cin >> i1 >> i2 >> i3;
                                  cout << " " << i1 << " " << i2 << " " << i3;
                                       //take appropriate actions
                                      }
              cout << endl;

            }
    else if (oper == "member")
            {//...
            }
    // ...
  }
}