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
b2a2
b2b1
b2f2
b2e2
b2d2
b2c2
b2b8
b2b7
b2b6
b2b5
b2b4
b2b3
a5b3
a5b7
a5c4
a5c6
e6d5
e6c8
e6d7
e6h3
e6g4
e6f5
c7b6
c7b8
c7d8
f7f5
f7f6
g7g5
g7g6
h7h5
h7h6
e8a8
e8b8
e8c8
e8d8
e8e7
e8f8
g8h8
g8f8

## Board State Fen
4r1k1/2b2ppp/p2pb3/n1pBp3/R1N1P3/2PPN3/1r3PPP/3R2K1 b - - 3 24
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
b2a2
b2b1
b2f2
b2e2
b2d2
b2c2
b2b8
b2b7
b2b6
b2b5
b2b4
b2b3
a5b3
a5b7
a5c4
a5c6
e6d5
e6c8
e6d7
e6h3
e6g4
e6f5
c7b6
c7b8
c7d8
f7f5
f7f6
g7g5
g7g6
h7h5
h7h6
e8a8
e8b8
e8c8
e8d8
e8e7
e8f8
g8h8
g8f8

## Board State Fen
4r1k1/2b2ppp/p2pb3/n1pBp3/R1N1P3/2PPN3/1r3PPP/3R2K1 b - - 3 24
assistant
a5c4