#include <stdio.h>
#include <stdlib.h>

int main(){
    int n = 0, z = 0, count[3000], temp[3000], lol = 0;

    while(scanf("%d", &n) != EOF){

    for(z = 0; z < n; z++)
        scanf("%d", &count[z]);

    for(z = 0; z < n; z++)
         temp[z] = count[z] - count[z+1];

    for(z = 0; z < n - 1; z++){
        if(temp[z] < 0)
          temp[z] *= -1;
    }

    for(z = 0; z < n - 1; z++)
        if(temp[z] > n - 1)
            lol++;

    if(lol == 0)
       printf("Jolly\n");
    else if(lol > 0)
       printf("Not jolly");
    }
    return 0;
}