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
a1c1
a1b1
a1a3
a1a2
d1b1
d1c1
d1f1
d1e1
g1h1
g1f1
b2b4
b2b3
d2c1
d2a5
d2b4
d2c3
d2e1
e2a6
e2b5
e2c4
e2d3
e2f1
e2h5
e2g4
e2f3
f2f4
f2f3
g2g4
g2g3
h2h4
h2h3
e3e4
a4a5
d4c2
d4c6
d4e6
d4b3
d4b5
d4f3
d4f5

## Board State Fen
r2r2k1/1pbb1ppp/p3pn2/8/P2N4/4P3/1P1BBPPP/R2R2K1 w - - 3 18
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
a1c1
a1b1
a1a3
a1a2
d1b1
d1c1
d1f1
d1e1
g1h1
g1f1
b2b4
b2b3
d2c1
d2a5
d2b4
d2c3
d2e1
e2a6
e2b5
e2c4
e2d3
e2f1
e2h5
e2g4
e2f3
f2f4
f2f3
g2g4
g2g3
h2h4
h2h3
e3e4
a4a5
d4c2
d4c6
d4e6
d4b3
d4b5
d4f3
d4f5

## Board State Fen
r2r2k1/1pbb1ppp/p3pn2/8/P2N4/4P3/1P1BBPPP/R2R2K1 w - - 3 18
assistant
e2f3