
import java.util.Scanner;




public class Main{

  public static void main(String[] args){

    Scanner sc = new Scanner(System.in);

    String S = sc.next();

    String[] splitArray = S.split("");

    int flg = 0;



    for (int i = 0; i < splitArray.length - 1; i ++ ) {

      if (splitArray[i].equals(splitArray[i+1])) {

        System.out.println("Bad");

        System.exit(0);

      }

    }


    

    System.out.println("Good");



  }


}





/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz