Problem:
Score : 100 points

Problem Statement

The door of Snuke's laboratory is locked with a security code.

The security code is a 4-digit number. We say the security code is hard to enter when it contains two consecutive digits that are the same.

You are given the current security code S. If S is hard to enter, print Bad; otherwise, print Good.

Constraints

S is a 4-character string consisting of digits.

Input

Input is given from Standard Input in the following format:

S

Output

If S is hard to enter, print Bad; otherwise, print Good.

Sample Input 1

3776

Sample Output 1

Bad

The second and third digits are the same, so 3776 is hard to enter.

Sample Input 2

8080

Sample Output 2

Good

There are no two consecutive digits that are the same, so 8080 is not hard to enter.

Sample Input 3

1333

Sample Output 3

Bad

Sample Input 4

0024

Sample Output 4

Bad

Solution in Scala (2.11.7) (judge verdict: Accepted)

import java.util.Scanner

object Main extends App{
  val sc = new Scanner(System.in)

  val s = sc.next
  val cs = strSplit(s)

  val judge =
    cs(0) == cs(1) ||
    cs(1) == cs(2) ||
    cs(2) == cs(3)

  val res = if(judge) "Bad" else "Good"

  println(res)

  def strSplit(str: String): Array[String] ={
    str.split("(?<=.)")
  }

}