public class Solution {
    private static List<String> strings;

    public static void main(String[] args) throws Exception {
        //write your code here
        strings = new ArrayList<String>();
        int max = 0;
        Scanner sc = new Scanner(System.in);
        for (int y = 0; y < 5; y++){
            String a = sc.next();
            strings.add(a);
        }
        max = strings.get(0).length();

        for (int x = 0; x < strings.size(); x++){
            if (strings.get(x).length() > max)
                max = strings.get(x).length();

        }
        for (int i = 0; i < 5; i++){
            if (max == strings.get(i).length())
                System.out.println(strings.get(i));

        }

    }