#include <iostream>
#include <vector>
#include <numeric>

using namespace std;

int main(int argc, char **argv)
{
    using namespace std;

    int n;
    while (cin >> n)
    {
        vector<int> found(static_cast<vector<int>::size_type>(n-1), 0), input(static_cast<vector<int>::size_type>(n), 0);
        for (int i(0); i < n; cin >> input[i], i++);
        for (int i(0); i < n - 1; i++)
        {
            int diff(abs(input[i]-input[i+1]));
            if (diff && diff < n) found[diff-1] = 1;
            else break;
        }

        if (static_cast<int>(found.size()) == accumulate(found.begin(), found.end(), 0, plus<vector<int>::value_type>())) cout << "Jolly" << endl;
        else cout << "Not jolly" << endl;
    }
}