#include <iostream>

using namespace std;


class WebPage;

   class ItLinks {
     private:
       int       IndexTerm;  // Web page id
       WebPage*  wplink;     // Pointer to web page
     public:
     };

   class WebPage {
     private:
       int       wpnumber;   // Web page id
       WebPage*  nextwp;     // Pointer to web page
       ItLinks   itl[3];     //Index terms Links
     public:
     };

   class WebList {
     private:
       WebPage*  first;     // Pointer to first web page in list
       int       number;    // Total number of web pages in list
     public:
     };

   class IndexTerm {
     private:
       int        itnumber;       //Index term id
       int        numberoftimes;  //# of web pages that include itnumber
       WebPage*   link2webpage;   //Pointer to web page
       IndexTerm* nextit;          //Pointer to index term
     public:
     };

   class ITList {
     private:
       IndexTerm*  first;   // Pointer to index term in list
       int       number;    // Total number of (different) index terms
     public:
     };



// The following function takes as input a pointer to the first element
// in the web pages list and an integer m and returns a pointer to the
// instance of struct webpage that represent web page m, or NULL (zero)
// if the web page is not in the list.


int main(void) 
{ int m,i1,i2;
  char t;
  // ...
  while(1==1)
   {cin.get(t);
    switch(t) {
     case('i'): {cin >> m >> i1 >> i2;
                 cout << "i " << m << " " << i1 << " " << i2 << endl;
                 /* Should invoke a function to insert a web page*/
                 break;}
     case('d'): {cin >> m;
                 cout << "d " << m << endl;
                 /* Should invoke a function to delete a web page */
                 break;}
            //  ...
     case('l'): {cout << "l" << endl;
                 /* Should invoke a function to print the correct number */
                 break;}
            //  ...
     case('q'): {cout << "l" << endl; // need to delete lists
                 exit(0);}
    }
  cin.get(t);
  if('\n' != t) exit(1);
   }
}