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
b5b4
d5c3
d5c7
d5e3
d5b4
d5f4
d5f6
b6a7
b6d4
b6c5
b6c7
b6a6
b6b8
b6b7
c6c5
e7a3
e7b4
e7c5
e7d6
e7h4
e7g5
e7f6
e7f8
f7f5
f7f6
g7g5
g7g6
h7h5
h7h6
a8a6
a8a7
a8c8
a8b8
d8b8
d8c8
d8d6
d8d7
e8d7
g8h8
g8f8

## Board State Fen
r2rb1k1/4bppp/1qp1p3/pp1nP3/3PN3/P2QN1P1/1P3PBP/2R2RK1 b - - 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
a5a4
b5b4
d5c3
d5c7
d5e3
d5b4
d5f4
d5f6
b6a7
b6d4
b6c5
b6c7
b6a6
b6b8
b6b7
c6c5
e7a3
e7b4
e7c5
e7d6
e7h4
e7g5
e7f6
e7f8
f7f5
f7f6
g7g5
g7g6
h7h5
h7h6
a8a6
a8a7
a8c8
a8b8
d8b8
d8c8
d8d6
d8d7
e8d7
g8h8
g8f8

## Board State Fen
r2rb1k1/4bppp/1qp1p3/pp1nP3/3PN3/P2QN1P1/1P3PBP/2R2RK1 b - - 1 19
assistant
f7f6