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
c3a1
c3b2
c3a5
c3b4
c3e1
c3d2
d4c2
d4c6
d4e2
d4e6
d4b3
d4b5
d4f3
d4f5
g4f3
g4d7
g4e6
g4f5
g4h3
g4h5
a7a5
a7a6
f7f5
f7f6
h7h5
h7h6
f8a8
f8b8
f8c8
f8d8
f8e8
g8h8
g8g7

## Board State Fen
5rk1/p2R1p1p/6p1/6B1/3nB1b1/2b2N2/P4PPP/5RK1 b - - 0 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
c3a1
c3b2
c3a5
c3b4
c3e1
c3d2
d4c2
d4c6
d4e2
d4e6
d4b3
d4b5
d4f3
d4f5
g4f3
g4d7
g4e6
g4f5
g4h3
g4h5
a7a5
a7a6
f7f5
f7f6
h7h5
h7h6
f8a8
f8b8
f8c8
f8d8
f8e8
g8h8
g8g7

## Board State Fen
5rk1/p2R1p1p/6p1/6B1/3nB1b1/2b2N2/P4PPP/5RK1 b - - 0 19
assistant
d4f3