Given the available moves based on the current board state in FEN notation, think carefully about which move would be best, then make that move. Be sure to note your color indicated in the FEN notation before deciding.
## Available Moves
b5a5
b5b2
b5b3
b5b4
b5h5
b5g5
b5f5
b5e5
b5d5
b5c5
b5b8
b5b7
b5b6
h6h5
g8h8
g8g7

## Board State Fen
6k1/8/5RPp/1r6/p7/P1K5/1P6/8 b - - 2 41
system
You are a chess playing AI.
user
Given the available moves based on the current board state in FEN notation, think carefully about which move would be best, then make that move. Be sure to note your color indicated in the FEN notation before deciding.
## Available Moves
b5a5
b5b2
b5b3
b5b4
b5h5
b5g5
b5f5
b5e5
b5d5
b5c5
b5b8
b5b7
b5b6
h6h5
g8h8
g8g7

## Board State Fen
6k1/8/5RPp/1r6/p7/P1K5/1P6/8 b - - 2 41
assistant
g8g7