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
a5a4
a6d3
a6c4
a6b5
a6b7
a6c6
a6b6
a6a7
d6d5
e6b3
e6c4
e6d5
e6d7
e6h3
e6g4
e6f5
f6e4
f6e8
f6g4
f6d5
f6d7
f6h5
f6h7
h6h5
e7d8
e7f8
g7g5
g7g6
a8a7
a8b8
c8b8
c8c3
c8c4
c8c5
c8c6
c8c7
c8f8
c8e8
c8d8
g8h8
g8h7
g8f8

## Board State Fen
r1r3k1/4bpp1/q2pbn1p/p3p3/4P3/1PNQN3/P4PPP/R2RB1K1 b - - 3 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
a5a4
a6d3
a6c4
a6b5
a6b7
a6c6
a6b6
a6a7
d6d5
e6b3
e6c4
e6d5
e6d7
e6h3
e6g4
e6f5
f6e4
f6e8
f6g4
f6d5
f6d7
f6h5
f6h7
h6h5
e7d8
e7f8
g7g5
g7g6
a8a7
a8b8
c8b8
c8c3
c8c4
c8c5
c8c6
c8c7
c8f8
c8e8
c8d8
g8h8
g8h7
g8f8

## Board State Fen
r1r3k1/4bpp1/q2pbn1p/p3p3/4P3/1PNQN3/P4PPP/R2RB1K1 b - - 3 19
assistant
a6b7