import 'dart:io';
import 'dart:math' show Random;

void main() {

    int trycount = 0;

    Random r = new Random();

    int fucking_number = r.nextInt(15);

    while (trycount < 3) {

        if (stdin.readLineSync() != fucking_number) {

            trycount++;
            print("not c:");

        }else {

            print("GOOD");
            exit(0);

        }

    }

    print("game over c:\nIt's $fucking_number");

}