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

int main()
{
    int n;
    scanf("%d", &n); fgetc(stdin);
    for (int i = 0; i < n; i++) {
        char s[257];
        scanf("%[^\n]", s); fgetc(stdin);
    }

    // Write an answer using printf(). DON'T FORGET THE TRAILING \n
    // To debug: fprintf(stderr, "Debug messages...\n");

    printf("good_luck\n");

    return 0;
}