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
b2a1
b2a3
b2c1
b2d4
b2c3
b5a4
b5c4
b5b4
d6e7
d6e6
d6d7
d6c7
g6g5

## Board State Fen
8/8/2pk2p1/ppp1p2p/P1P1Pp1P/1P1P1P2/1b3KP1/4N3 b - - 3 44
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
b2a1
b2a3
b2c1
b2d4
b2c3
b5a4
b5c4
b5b4
d6e7
d6e6
d6d7
d6c7
g6g5

## Board State Fen
8/8/2pk2p1/ppp1p2p/P1P1Pp1P/1P1P1P2/1b3KP1/4N3 b - - 3 44
assistant
b2d4