import java.io.InputStreamReader;
import java.io.*;
import java.util.*;

public class JollyRancher {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        String line = br.readLine();
        while (line != null) {
            String[] input = line.split(" ");
            int[] input1 = new int[input.length-1];
            int n = Integer.parseInt(input[0]);
            for (int i = 1; i < input.length; i++) {
                input1[i-1] = Integer.parseInt(input[i]);
            }
            System.out.println(jollyRancher((input1), n));
            line = br.readLine();
        }
    }

    private static String jollyRancher(int[] input1, int n) {
        HashSet<Integer> nums = new HashSet<Integer>();
        for (int i = 1; i < n; i++) {
            nums.add(i);
        }
        for (int i = 0; i < input1.length; i++) {
            try {
                int val = Math.abs(input1[i - 1] - input1[i]);
                nums.remove(val);
            } catch (ArrayIndexOutOfBoundsException e) {

            }
        }
        if (nums.isEmpty()) {
            return "Jolly";
        } else {
            return "Not jolly";
        }
    }
}