#include<bits/stdc++.h>
using namespace std;

int n, a[1010], b[1010];
int main(){
	cin >> n;
	for (int i = 0; i < n; i++){
		cin >> a[i];
	}
	for (int i = 1; i < n; i++){
		b[i] = abs(a[i]-a[i-1]);
	}
	bool x = 1;
	for (int i = 1; i < n; i++){
		bool bb = 0;
		for (int j = 0; j < n; j++){
			if (a[j] == b[i]){
				bb = 1;
				break;
			}
		}
		if (bb == 0){
			x = 0;
			break;
		}
	}
	if (x){
		cout << "Jolly";
	}else{
		cout << "Not jolly";
	}
	return 0;
}