#include<bits/stdc++.h>
using namespace std;
int n,a[1009],maxx=100000000,f=1;
int main(){
	cin>>n;
	for(int i=1;i<=n;i++)
		cin>>a[i];
	for(int i=2;i<=n;i++)
	{
		if(max(a[i],a[i-1])-min(a[i],a[i-1])>maxx)
		{
			f=0;
			cout<<"Not jolly";
			break;
		}
		else maxx=max(a[i],a[i-1])-min(a[i],a[i-1]);
	}
	if(f==1)cout<<"jolly";
	return 0;
}