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
b5b4
a6b4
a6b8
a6c5
a6c7
g6g5
e7e6
f7f5
f7f6
h7h5
h7h6
a8a7
a8d8
a8c8
a8b8
e8f8
e8d7

## Board State Fen
r3k3/4pp1p/n1R3p1/Bp2P3/4p3/1P2P1P1/5P1P/6K1 b - - 3 28
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
b5b4
a6b4
a6b8
a6c5
a6c7
g6g5
e7e6
f7f5
f7f6
h7h5
h7h6
a8a7
a8d8
a8c8
a8b8
e8f8
e8d7

## Board State Fen
r3k3/4pp1p/n1R3p1/Bp2P3/4p3/1P2P1P1/5P1P/6K1 b - - 3 28
assistant
e8d7