// R38820772

#include <bits/stdc++.h>

using namespace std;

bool cnt[10000005];
int n, a[1005];

int main() {
    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    for (int i = 1; i < n; i++) {
        if (!cnt[abs(a[i] - a[i - 1])]) {
            cnt[abs(a[i] - a[i - 1])] = true;
        } else {
            cout << "Not jolly" << endl;
            return 0;
        }
    }
    cout << "Jolly" << endl;
    return 0;
}