import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();

        char[] c = s.toCharArray();
        String ans = "Good";
        for (int i = 1; i < c.length; i++) {
            if (c[i] == c[i - 1]) {
                ans = "Bad";
            }
        }

        System.out.println(ans);
    }
} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();

        char[] c = s.toCharArray();
        String ans = "Good";
        for (int i = 1; i < c.length; i++) {
            if (c[i] == c[i - 1]) {
                ans = "Bad";
            }
        }

        System.out.println(ans);
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();

        char[] c = s.toCharArray();
        String ans = "Good";
        for (int i = 1; i < c.length; i++) {
            if (c[i] == c[i - 1]) {
                ans = "Bad";
            }
        }

        System.out.println(ans);
    } main {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();

        char[] c = s.toCharArray();
        String ans = "Good";
        for (int i = 1; i < c.length; i++) {
            if (c[i] == c[i - 1]) {
                ans = "Bad";
            }
        }

        System.out.println(ans);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.nextLine(); s sc.nextLine() sc.nextLine sc char[] c = s.toCharArray(); c s.toCharArray() s.toCharArray s String ans = "Good"; ans "Good" for (int i = 1; i < c.length; i++) {
            if (c[i] == c[i - 1]) {
                ans = "Bad";
            }
        } int i = 1; int i = 1; i 1 i < c.length i c.length c c.length i++ i++ i {
            if (c[i] == c[i - 1]) {
                ans = "Bad";
            }
        } {
            if (c[i] == c[i - 1]) {
                ans = "Bad";
            }
        } if (c[i] == c[i - 1]) {
                ans = "Bad";
            } c[i] == c[i - 1] c[i] c i c[i - 1] c i - 1 i 1 {
                ans = "Bad";
            } ans = "Bad" ans "Bad" System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();

        char[] c = s.toCharArray();
        String ans = "Good";
        for (int i = 1; i < c.length; i++) {
            if (c[i] == c[i - 1]) {
                ans = "Bad";
            }
        }

        System.out.println(ans);
    }
} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();

        char[] c = s.toCharArray();
        String ans = "Good";
        for (int i = 1; i < c.length; i++) {
            if (c[i] == c[i - 1]) {
                ans = "Bad";
            }
        }

        System.out.println(ans);
    }
} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();

        char[] c = s.toCharArray();
        String ans = "Good";
        for (int i = 1; i < c.length; i++) {
            if (c[i] == c[i - 1]) {
                ans = "Bad";
            }
        }

        System.out.println(ans);
    }
}
