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
a5b3
a5c4
a5c6
b5b4
f6e4
f6e8
f6g4
f6d5
f6d7
f6h5
b7g2
b7f3
b7e4
b7d5
b7c6
b7c8
e7a3
e7b4
e7c5
e7d6
g7g5
g7g6
h7h5
h7h6
a8a7
a8c8
a8b8
d8b6
d8c7
d8b8
d8c8
d8d4
d8d5
d8d6
d8d7
d8e8
f8e8
g8h8

## Board State Fen
r2q1rk1/1b2bppp/p3pn2/np2N3/3P4/2NQ3P/PPB2PP1/R1B1R1K1 b - - 3 15
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
a5b3
a5c4
a5c6
b5b4
f6e4
f6e8
f6g4
f6d5
f6d7
f6h5
b7g2
b7f3
b7e4
b7d5
b7c6
b7c8
e7a3
e7b4
e7c5
e7d6
g7g5
g7g6
h7h5
h7h6
a8a7
a8c8
a8b8
d8b6
d8c7
d8b8
d8c8
d8d4
d8d5
d8d6
d8d7
d8e8
f8e8
g8h8

## Board State Fen
r2q1rk1/1b2bppp/p3pn2/np2N3/3P4/2NQ3P/PPB2PP1/R1B1R1K1 b - - 3 15
assistant
a5c6