import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        int count = 0;
        for (int i = 0; i < s.length() - 1; i++) {
            if (s.charAt(i) == s.charAt(i + 1)) count++;
        }
        if (count >= 1) System.out.println("Bad");
        else System.out.println("Good");
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        int count = 0;
        for (int i = 0; i < s.length() - 1; i++) {
            if (s.charAt(i) == s.charAt(i + 1)) count++;
        }
        if (count >= 1) System.out.println("Bad");
        else System.out.println("Good");
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        int count = 0;
        for (int i = 0; i < s.length() - 1; i++) {
            if (s.charAt(i) == s.charAt(i + 1)) count++;
        }
        if (count >= 1) System.out.println("Bad");
        else System.out.println("Good");
    } main {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        int count = 0;
        for (int i = 0; i < s.length() - 1; i++) {
            if (s.charAt(i) == s.charAt(i + 1)) count++;
        }
        if (count >= 1) System.out.println("Bad");
        else System.out.println("Good");
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc int count = 0; count 0 for (int i = 0; i < s.length() - 1; i++) {
            if (s.charAt(i) == s.charAt(i + 1)) count++;
        } int i = 0; int i = 0; i 0 i < s.length() - 1 i s.length() - 1 s.length() s.length s 1 i++ i++ i {
            if (s.charAt(i) == s.charAt(i + 1)) count++;
        } {
            if (s.charAt(i) == s.charAt(i + 1)) count++;
        } if (s.charAt(i) == s.charAt(i + 1)) count++; s.charAt(i) == s.charAt(i + 1) s.charAt(i) s.charAt s i s.charAt(i + 1) s.charAt s i + 1 i 1 count++ count if (count >= 1) System.out.println("Bad");
        else System.out.println("Good"); count >= 1 count 1 System.out.println("Bad") System.out.println System.out System System.out "Bad" System.out.println("Good") System.out.println System.out System System.out "Good" String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        int count = 0;
        for (int i = 0; i < s.length() - 1; i++) {
            if (s.charAt(i) == s.charAt(i + 1)) count++;
        }
        if (count >= 1) System.out.println("Bad");
        else System.out.println("Good");
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        int count = 0;
        for (int i = 0; i < s.length() - 1; i++) {
            if (s.charAt(i) == s.charAt(i + 1)) count++;
        }
        if (count >= 1) System.out.println("Bad");
        else System.out.println("Good");
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        int count = 0;
        for (int i = 0; i < s.length() - 1; i++) {
            if (s.charAt(i) == s.charAt(i + 1)) count++;
        }
        if (count >= 1) System.out.println("Bad");
        else System.out.println("Good");
    }
}