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
c1a1
c1b1
c1e1
c1d1
c1c5
c1c4
c1c3
c1c2
f1d1
f1e1
g1h1
a2a4
a2a3
b2b3
e2d1
e2b5
e2c4
e2d3
e2h5
e2g4
e2f3
e2c2
e2d2
e2e1
f2f4
f2f3
g2g4
g2g3
h2h4
h2h3
e3e4
d4c2
d4c6
d4e6
d4b3
d4b5
d4f3
d4f5
a6d3
a6c4
a6b5
a6c8
a6b7

## Board State Fen
5rk1/5pp1/B3pb1p/q1rb4/1p1N4/4P3/PP2QPPP/2R2RK1 w - - 0 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
c1a1
c1b1
c1e1
c1d1
c1c5
c1c4
c1c3
c1c2
f1d1
f1e1
g1h1
a2a4
a2a3
b2b3
e2d1
e2b5
e2c4
e2d3
e2h5
e2g4
e2f3
e2c2
e2d2
e2e1
f2f4
f2f3
g2g4
g2g3
h2h4
h2h3
e3e4
d4c2
d4c6
d4e6
d4b3
d4b5
d4f3
d4f5
a6d3
a6c4
a6b5
a6c8
a6b7

## Board State Fen
5rk1/5pp1/B3pb1p/q1rb4/1p1N4/4P3/PP2QPPP/2R2RK1 w - - 0 21
assistant
d4b3