// Problem: P1152 欢乐的跳
// Contest: Luogu
// URL: https://www.luogu.com.cn/problem/P1152
// Memory Limit: 125 MB
// Time Limit: 1000 ms
// User: Pannnn
#include
using namespace std;
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int n;
cin >> n;
vector info(n);
vector t(n);
for (int i = 0; i < n; ++i) {
cin >> t[i];
}
for (int i = 1; i < n; ++i) {
int tmp = abs(t[i] - t[i - 1]);
if (tmp >= 1 && tmp <= n - 1) {
++info[tmp];
}
}
for (int i = 1; i < n; ++i) {
if (info[i] == 0) {
cout << "Not jolly" << endl;
return 0;
}
}
cout << "Jolly" << endl;
return 0;
}