Description

Format

Input

Output

Output one line. If Siri can win, output “GOOD”, otherwise output “BAD” (without quotes).

Samples

用例1

1 1
2

BAD

用例2

2 3
4 5

GOOD

Limitation

Input file:

standard input

Output file:

standard output

Time limit: 2 seconds

Memory limit: 512 megabytes