#include <bits/stdc++.h>
using namespace std;
long long n, x, t;
vector <long long> v, ans;
int main() {
	cin >> n;
	v.push_back(0);
	for (int i = 0; i < n; i++) {
		cin >> x;
		v.push_back(x);
	}
	for (int i = 1; i < n; i++)
		ans.push_back(abs(v[i] - v[i - 1]));
	for (int i = 1; i < n; i++)
		if (count(ans.begin(), ans.end(), i) == 0 || count(ans.begin(), ans.end(), i) >= 2) {
			t = 1;
			break;
		}
	if (!t) cout << "Jolly";
	else cout << "Not jolly";	
}