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
b1a1
b1g1
b1f1
b1e1
b1d1
b1c1
b1b2
h1g1
c2a2
c2b2
c2c1
c2c3
d2c1
d2a5
d2b4
d2c3
d2e1
d2h6
d2g5
d2f4
d2e3
g2g4
g2g3
h2h4
h2h3
a3a4
b3b4
f3d1
f3e2
f3h5
f3g4
c4c5

## Board State Fen
r4rk1/4p2p/n2p2p1/p3b3/2P1P3/PP3B2/2RB2PP/1R5K w - - 1 31
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
b1a1
b1g1
b1f1
b1e1
b1d1
b1c1
b1b2
h1g1
c2a2
c2b2
c2c1
c2c3
d2c1
d2a5
d2b4
d2c3
d2e1
d2h6
d2g5
d2f4
d2e3
g2g4
g2g3
h2h4
h2h3
a3a4
b3b4
f3d1
f3e2
f3h5
f3g4
c4c5

## Board State Fen
r4rk1/4p2p/n2p2p1/p3b3/2P1P3/PP3B2/2RB2PP/1R5K w - - 1 31
assistant
b3b4