#include <iostream>
#include <map>
#include "assert.h"
#include <string>

using namespace std;

typedef ? LIBRARY_TYPE;
typedef ? PEOPLE_TYPE;

void addItem(LIBRARY_TYPE& library);
void checkoutItem(LIBRARY_TYPE& library, PEOPLE_TYPE& people);
void returnItems(LIBRARY_TYPE& library, PEOPLE_TYPE& people);
void lookup(LIBRARY_TYPE& library);
void printPeople(PEOPLE_TYPE& people);

int main() {
  LIBRARY_TYPE library;
  PEOPLE_TYPE people;
  char c;
  while (cin >> c) {
    if (c == 'a') {
      addItem(library);
    } else if (c == 'c') {
      checkoutItem(library,people);
    } else if (c == 'r') {
      returnItems(library,people);
    } else if (c == 'l') {
      lookup(library);
    } else if (c == 'p') {
      printPeople(people);
    } else {
      cerr << "error unknown char " << c << endl;
      exit(0);
    }
  }
}

void addItem(LIBRARY_TYPE& library) {
  string title;
  int num;
  cin >> num >> title;







}

void checkoutItem(LIBRARY_TYPE& library, PEOPLE_TYPE& people) {
  string name;
  string title;
  cin >> name >> title;







}

void returnItems(LIBRARY_TYPE& library, PEOPLE_TYPE& people) {
  string name;
  cin >> name;







}

void lookup(LIBRARY_TYPE& library) {
  string title;
  cin >> title;







}

void printPeople(PEOPLE_TYPE& people) {








}