public class Solution {
    public static void main(String[] args) throws IOException {
        ArrayList<String> arr = new ArrayList<String>();
        Scanner sc = new Scanner(System.in);
        for (int i = 0; i < 10; i++){
            arr.add(sc.nextLine());
        }
        int min = arr.indexOf(Collections.min(arr));
        int max = arr.indexOf(Collections.max(arr));

        if (min == max){
            System.out.println(Collections.min(arr));
        } else {
            System.out.println(Collections.max(arr));
        }
    }
}