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
a1b1
a1a7
a1a6
a1a5
a1a4
a1a3
a1a2
c1h6
c1g5
c1f4
c1e3
c1d2
f1d1
f1e1
g1h1
f2f4
f2f3
b3b4
c3b1
c3b5
c3d1
c3a2
c3a4
c3e2
g3g4
d5c4
d5c6
d5f7
d5e6

## Board State Fen
r2r2k1/pp3p2/2n3pp/3Bb3/4P3/1PN3Pb/1P3P1P/R1B2RK1 w - - 1 19
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
a1b1
a1a7
a1a6
a1a5
a1a4
a1a3
a1a2
c1h6
c1g5
c1f4
c1e3
c1d2
f1d1
f1e1
g1h1
f2f4
f2f3
b3b4
c3b1
c3b5
c3d1
c3a2
c3a4
c3e2
g3g4
d5c4
d5c6
d5f7
d5e6

## Board State Fen
r2r2k1/pp3p2/2n3pp/3Bb3/4P3/1PN3Pb/1P3P1P/R1B2RK1 w - - 1 19
assistant
f1d1