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备注：
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#include <queue>
#include <math.h>
#include <stack>
#include <stdio.h>
#include <iostream>
#include <vector>
#include <iomanip>
#include <string.h>
#include <algorithm>
using namespace std;
#define LL long long
const int N = 1e5 + 10;
const int INF = 0x3f3f3f3f;
int a[N];
int main()
{
	int n ;
	while(cin >> n)
	{
		memset(a,0,sizeof(a));//string.h  初始化数组
		int pre;
		cin >> pre;
		int now;
		for(int i = 1 ; i < n ; i++)
		{
			cin >> now;
			int s = now - pre;
			if(s < 0)
				s = s * -1;
			a[s] = 1;
			pre = now;
		}
		int flag = 1;
		for(int i = 1 ; i < n ; i++)
		{
			if(a[i] == 0)
			{
				flag=  0;
				break;
			}
		}
		if(flag == 1)
			cout << "Jolly\n";
		else 
			cout << "Not jolly\n";
	}
	return 0;
}