RE*3

#include<bits/stdc++.h>
#define ll long long
using namespace std;
int n;
ll a[1010],c[1010];
int main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>a[i];
		if(i!=1&&c[abs(a[i]-a[i-1])]!=1&&abs(a[i]-a[i-1])<=n-1) c[abs(a[i]-a[i-1])]=1;
		else if(i!=1){
			cout<<"Not jolly";
			return 0;
		}
	}
	cout<<"Jolly";
	return 0;
}