using System;

public class Program

{

    public static void Main() 

    {                                                                                                                                                                                                            

    double  x=double.Parse(Console.ReadLine());

    double  y=double.Parse(Console.ReadLine());

    if(x%2==0 && y%2==0 && (x+y)%3==0)

        Console.WriteLine("good");

    else 

    Console.WriteLine("bad");       

    }

}