package com.company;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int result = in.nextInt();
        for (int i = 1; i < 3; i++)
            result ^= in.nextInt();

        System.out.println(result == 0 ? "Not exist" : "Exist");
    }
}