public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        ArrayList<String> arr = new ArrayList<>();
        for (int i = 0; i < 10; i++) arr.add(br.readLine());

        //int a =  arr.get(0).length();
        for (int i = 1; i < 9; i++) {
                if (arr.get(i).length() <= arr.get(i + 1).length() + 1) continue;
                else if (arr.get(i).length() >= arr.get(i + 1).length() + 1) continue;
                else if (arr.get(i).length() < arr.get(i + 1).length()) {
                    System.out.println(arr.get(i + 1));
                    break;
                }
                else if (arr.get(i).length() > arr.get(i + 1).length()) {
                    System.out.println(arr.get(i + 1));
                    break;
                }
                else {
                    System.out.println(arr.get(0).length());
                    break;
                }
        }
    }
}