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
a1d1
a1c1
a1b1
e1b1
e1c1
e1d1
e1f1
g1h2
g1h1
g1f1
a2a3
b2b4
b2b3
d2c1
d2h6
d2g5
d2f4
d2e3
d2c2
d2d1
d2d3
e2e4
e2e3
f2f4
f2f3
g2f1
g2d5
g2e4
g2f3
g2h1
g2h3
c3b1
c3b5
c3d1
c3d5
c3a4
c3e4
d4a7
d4b6
d4c5
d4e3
d4f6
d4e5
h4h5

## Board State Fen
r2qr1k1/5pbp/2p2np1/3p4/p2B2bP/2N3P1/PP1QPPB1/R3R1K1 w - - 0 16
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
a1d1
a1c1
a1b1
e1b1
e1c1
e1d1
e1f1
g1h2
g1h1
g1f1
a2a3
b2b4
b2b3
d2c1
d2h6
d2g5
d2f4
d2e3
d2c2
d2d1
d2d3
e2e4
e2e3
f2f4
f2f3
g2f1
g2d5
g2e4
g2f3
g2h1
g2h3
c3b1
c3b5
c3d1
c3d5
c3a4
c3e4
d4a7
d4b6
d4c5
d4e3
d4f6
d4e5
h4h5

## Board State Fen
r2qr1k1/5pbp/2p2np1/3p4/p2B2bP/2N3P1/PP1QPPB1/R3R1K1 w - - 0 16
assistant
a2a3