import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;

/*
Самая длинная строка
*/

public class Solution {
    private static ArrayList<String> strings;
    public static BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    static int strLenght = 0;

    public static void main(String[] args) throws Exception {
    strings = new ArrayList<String>();
     for (int i = 0; i < 5; i++){
         String s = reader.readLine();
         strings.add(s);
     }
     for (int i = 0; i < strings.size(); i++){

         if (strings.get(i).length() >= strLenght){
            strLenght = strings.get(i).length();
            }
         }
     for (int i = 0; i < strings.size(); i++){
         if (strings.get(i).length() == strLenght){
             System.out.println(strings.get(i));
         }
     }
    }
}