#include<iostream>
#include<cstring>
#include<cmath>
using namespace std;
#define N 1010
bool b[N];
int main()
{
	int n;
	cin>>n;
	int a[N];
	for(int i=1;i<=n;++i)
	{
		cin>>a[i];
	}
	memset(b,false,sizeof(b));
	for(int i=2;i<=n;++i)
	{
		b[abs(a[i]-a[i-1])]=true;
	}
	for(int i=1;i<=n-1;++i)
	{
		if(b[i]==false)
		{
			cout<<"Not jolly";
			return 0;
		}
	}
	cout<<"Jolly";
	return 0;
}

3 7 9 10 RE 求助