#include <bits/stdc++.h>
using namespace std;
const int N = 3e3 + 10;
int n,a[N];
bool v[N];
int main(){
	while(cin >> n){
		memset(v,0,sizeof(v));
		int sum = 0;
		cin >> a[1];
		for(int i = 2;i <= n;i++){
			cin >> a[i];
			if(abs(a[i] - a[i - 1]) < n && v[abs(a[i] - a[i - 1])] == 0){
				v[abs(a[i] - a[i - 1])] = 1;
				sum++;
			}
		}
		if(sum == n - 1){
			cout << "Jolly" << endl;
		}else{
			cout << "Not jolly" << endl;
		}
	}
	return 0;
}