#include<bits/stdc++.h>
using namespace std;
long long n,a[1000005];
bool b=1;
int main()
{cin>>n;
for(int i=0;i<n;i++){ cin>>a[i];}
for(int j=0;j<n;j++){if(a[j]-a[j+1]>n-1)b=0;}
if(b==1) cout<<"Jolly";
else cout<<"Not jolly";
}