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
d1b1
d1c1
d1h1
d1g1
d1f1
d1e1
a2a4
a2a3
b2b4
b2b3
c2b1
c2a4
c2b3
c2d3
d2c1
d2e1
e2f3
e2f1
e2e1
f2f4
f2f3
g2g4
g2g3
h2h4
h2h3
c3c4
e3d5
e3f1
e3f5
e3c4
e3g4

## Board State Fen
3r2k1/2p3pp/p1nrpn2/1pb1p3/4P3/2P1N3/PPBBKPPP/R2R4 w - - 7 21
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
d1b1
d1c1
d1h1
d1g1
d1f1
d1e1
a2a4
a2a3
b2b4
b2b3
c2b1
c2a4
c2b3
c2d3
d2c1
d2e1
e2f3
e2f1
e2e1
f2f4
f2f3
g2g4
g2g3
h2h4
h2h3
c3c4
e3d5
e3f1
e3f5
e3c4
e3g4

## Board State Fen
3r2k1/2p3pp/p1nrpn2/1pb1p3/4P3/2P1N3/PPBBKPPP/R2R4 w - - 7 21
assistant
a2a4