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
b4a4
b4b1
b4b2
b4b3
b4h4
b4g4
b4f4
b4e4
b4d4
b4c4
b4b8
b4b7
b4b6
b4b5
f5a5
f5b5
f5c5
f5d5
f5e5
f5f3
f5f4
f5h5
f5g5
f5f6
g6g5
h6h5
g7h8
g7h7
g7g8
g7f8
g7f6

## Board State Fen
8/R2R1pk1/6pp/5r2/1r5P/4PP2/6P1/6K1 b - - 0 35
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
b4a4
b4b1
b4b2
b4b3
b4h4
b4g4
b4f4
b4e4
b4d4
b4c4
b4b8
b4b7
b4b6
b4b5
f5a5
f5b5
f5c5
f5d5
f5e5
f5f3
f5f4
f5h5
f5g5
f5f6
g6g5
h6h5
g7h8
g7h7
g7g8
g7f8
g7f6

## Board State Fen
8/R2R1pk1/6pp/5r2/1r5P/4PP2/6P1/6K1 b - - 0 35
assistant
b4b2