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