import java.util.ArrayList;
import java.io.*;
import java.util.List;

public class Solution {
    public static void main(String[] args) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        ArrayList<String> list = new ArrayList<String>();

        for (int i = 0; i < 10; i++) // формируем строки
        {
            String s = reader.readLine();
            list.add(s);
        }


        for (int i = 0; i < 9; i++)
        {
            if (list.get(i).length() > list.get(i + 1).length()) {
                System.out.println(list.get(i + 1));
                break;
            }

        }


    }
}