#include<stdio.h>
#include<math.h>
int main()
{
	int a[10020], n,i,b=0;
	scanf("%d", &n);
	for (i = 1;i <=n;i++)
	{
		scanf("%d", &a[i]);
	}
	for (i = 1;i <= n;i++)
	{
		if (fabs(a[i + 1] - a[i]) <= (n - 1) && fabs(a[i + 1] - a[i]) >= 1)
			b++;
	}
	if (b == n-1)
		printf("Jolly");
	else
		printf("Not jolly");
	return 0;
}