Framed

Write a program that reads a positive integer (x) and a string of up to 50 characters from the standard input line by line until end-of-file (EOF). The string contains only lowercase letters of the English alphabet.

For each number and string, decide whether the first x characters of the string are the same as the last x characters. If so, write „Good” to the standard output, if not, „Bad”.

Sample Input

1. 1 aaaaaa
2. 1 aaabbb
3. 2 ababab
4. 2 abaaba
5. 3 ababa

Output for Sample Input

1. Good
2. Bad
3. Good
4. Bad
5. Good