import java.util.Scanner;

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

        for (int i = 0; i <s.length() - 1; i++) {
            if (s.charAt(i) == s.charAt(i+1)) {
                flag = true;
                break;
            }
        }

        if (flag) {
            System.out.println("Bad");
        
        } else {
            System.out.println("Good");
        }
    }
} 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();
        boolean flag = false;

        for (int i = 0; i <s.length() - 1; i++) {
            if (s.charAt(i) == s.charAt(i+1)) {
                flag = true;
                break;
            }
        }

        if (flag) {
            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.nextLine();
        boolean flag = false;

        for (int i = 0; i <s.length() - 1; i++) {
            if (s.charAt(i) == s.charAt(i+1)) {
                flag = true;
                break;
            }
        }

        if (flag) {
            System.out.println("Bad");
        
        } else {
            System.out.println("Good");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        boolean flag = false;

        for (int i = 0; i <s.length() - 1; i++) {
            if (s.charAt(i) == s.charAt(i+1)) {
                flag = true;
                break;
            }
        }

        if (flag) {
            System.out.println("Bad");
        
        } else {
            System.out.println("Good");
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.nextLine(); s sc.nextLine() sc.nextLine sc boolean flag = false; flag false for (int i = 0; i <s.length() - 1; i++) {
            if (s.charAt(i) == s.charAt(i+1)) {
                flag = true;
                break;
            }
        } 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)) {
                flag = true;
                break;
            }
        } {
            if (s.charAt(i) == s.charAt(i+1)) {
                flag = true;
                break;
            }
        } if (s.charAt(i) == s.charAt(i+1)) {
                flag = true;
                break;
            } 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 {
                flag = true;
                break;
            } flag = true flag true break; if (flag) {
            System.out.println("Bad");
        
        } else {
            System.out.println("Good");
        } flag {
            System.out.println("Bad");
        
        } System.out.println("Bad") System.out.println System.out System System.out "Bad" {
            System.out.println("Good");
        } 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.nextLine();
        boolean flag = false;

        for (int i = 0; i <s.length() - 1; i++) {
            if (s.charAt(i) == s.charAt(i+1)) {
                flag = true;
                break;
            }
        }

        if (flag) {
            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.nextLine();
        boolean flag = false;

        for (int i = 0; i <s.length() - 1; i++) {
            if (s.charAt(i) == s.charAt(i+1)) {
                flag = true;
                break;
            }
        }

        if (flag) {
            System.out.println("Bad");
        
        } else {
            System.out.println("Good");
        }
    }
} Main
import java.util.Scanner;

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

        for (int i = 0; i <s.length() - 1; i++) {
            if (s.charAt(i) == s.charAt(i+1)) {
                flag = true;
                break;
            }
        }

        if (flag) {
            System.out.println("Bad");
        
        } else {
            System.out.println("Good");
        }
    }
}