package com.codegym.task.task07.task0708;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
/*
Longest string
*/
public class Solution {
private static List<String> strings;
public static void main(String[] args) throws Exception {
//write your code here
strings=new ArrayList<String>();
BufferedReader a=new BufferedReader(new InputStreamReader(System.in));
for(int i=0;i<5;i++){
strings.add(a.readLine());
}
String max= null;int maxe=0;
for(int i=0;i<strings.size();i++){
for(int j=1;j==5;j++){
if(strings.get(i).length()<strings.get(j).length()){
maxe=strings.get(j).length();
}}}
// if(strings.get(i).length()==maxe)
// if(strings.get(i).length()==strings.get(j).length()))
// if(strings.get(i).length()==strings.get(j).length())
for(int i=0;i<strings.size();i++){
if(strings.get(i).length()==maxe)
{
max=strings.get(i);
}
}
System.out.println(max);
}
}