import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        sc.close();
        if (InputBad(S)) {
            System.out.println("Bad");
        } else {
            System.out.println("Good");
        }
    }
    public static boolean InputBad(String S) {
        if (S.length() < 2) {
            return false;
        }
        if (S.charAt(0) == S.charAt(1)) {
            return true;
        }
        return InputBad(S.substring(1));
    }
}

/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