#include "boost/date_time/gregorian/gregorian.hpp" 

#include <vector>

#include <string>

#include <iostream>

#include <algorithm>





using namespace std ;

using namespace boost::gregorian; 



void main()

{

       vector<date> dt ;

       string str ;

       while (cin >> str)

       {

               dt.push_back(from_string(str)) ;

       }

       

       sort(dt.begin(), dt.end()) ;

       date_duration dd, min_d(MAX_LONG);

       date d1, d2 ;

       for (vector<date>::iterator i = dt.begin() + 1; i != dt.end() ; i ++)

       {

             dd =   *i - *(i-1) ;   

             if (dd < min_d) 

            {

                 d1 = *i ; d2 = *(i - 1) ;

            }

       }

       cout << d1 << " " << d2 << endl ;

}