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
d1e2
d1b1
d1c1
d1d4
d1d3
d1d2
e1f1
e1e2
g1h2
g1h1
g1f1
b2b3
c2b1
c2a4
c2b3
c2d3
g2g4
g2g3
a3b1
a3b5
e3c1
e3d2
e3a7
e3b6
e3c5
e3d4
e3h6
e3g5
e3f4
f3e5
f3g5
f3d2
f3d4
f3h2
f3h4
h3h4
c4c5

## Board State Fen
r2q1rk1/n1pbbppp/3p1n2/3Pp3/ppP1P3/N3BN1P/PPB2PP1/R2QR1K1 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
a1c1
a1b1
d1e2
d1b1
d1c1
d1d4
d1d3
d1d2
e1f1
e1e2
g1h2
g1h1
g1f1
b2b3
c2b1
c2a4
c2b3
c2d3
g2g4
g2g3
a3b1
a3b5
e3c1
e3d2
e3a7
e3b6
e3c5
e3d4
e3h6
e3g5
e3f4
f3e5
f3g5
f3d2
f3d4
f3h2
f3h4
h3h4
c4c5

## Board State Fen
r2q1rk1/n1pbbppp/3p1n2/3Pp3/ppP1P3/N3BN1P/PPB2PP1/R2QR1K1 w - - 0 16
assistant
a3b1