#include<stdio.h>
int n,judge[1000],cur,pre,flag = 0;
int main()
{
    scanf("%d",&n);
    scanf("%d",&cur);
    for(int i = 1;i<n;i++)
    {
        pre = cur;
        scanf("%d",&cur);
        judge[abs(cur-pre)] = 1;
    }
    for(int i = 1;i<n;i++)
    {
        if (judge[i] != 1)
        {
            flag = 1;
            break;
        }
    }
    if(flag)
    {
        printf("Not jolly");
    }
    else
    {
        printf("Jolly");
    }
    return 0 ;
}