#include<stdio.h>

#ifndef DEBUG
#define DEBUG(...)printf(__VA_ARGS__)
#endif

int main()
{
    int n,i,j,pot=0,pot2=0,pot3=0,pot4=0;
    scanf("%d", &n);
    int arr[n][n];
    if (n==0)
    	return 0;
    //))))))))))))))))))))))))))))))))) unos
    for (i=0; i<n; i++){
        for (j=0; j<n; j++)
        {
            scanf("%d",&arr[i][j]);
        }
    }
    ///////////////////////////////////// glavna dijagonala
    for (i=0; i<n; i++){
        for (j=0; j<n; j++)
        {
            if(i==j){
                if(arr[i][j]==7)
                    pot++;
            }
        }

    }
    //????????????????????????????????? sporedna dijagonala
        //for (i=0; i<n; i++){
          i=0;

            for (j=n-1; j>=0; j--)
            {
            if(arr[i][j] == 7){
                pot2++;
                i++;
                }
            }
  //  }
    //================================= provjera redaka
        for (i=0; i<n; i++){
        for (j=0; j<n; j++)
        {
        	if(j > 0){
        		if((arr[i][j] == arr[i][j-1]  == 7)
        			printf("JACKPOT");

			}

        //    if((arr[i][j]==arr[i][j+1]) == 7){
           //     pot3++;
           // }

        }
    }
    //˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘˘ provjera stupaca
            for (i=0; i<n; i++){
        for (j=0; j<n; j++)
        {
            if((arr[i][j] == arr[i+1][j]) == 7){
                pot4++;
            }

        }
    }
    //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% ispis
    if(pot == n){
        printf("JACKPOT");
    }else if(pot2==n){
        printf("JACKPOT");
    }else if(pot3 ==n){
        printf("JACKPOT");
    }else if(pot4==n){
        printf("JACKPOT");
    }else printf("GUBITNIK");
  return 0;
}