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
a6a5
b5b4
c6b4
c6b8
c6d4
c6a5
c6a7
c6e5
e6e5
g6f4
g6h4
g6h8
g6e5
b7a8
d7d5
d7d6
e7a3
e7b4
e7c5
e7d6
e7h4
e7g5
e7f6
f7f5
f7f6
h7h5
h7h6
c8a8
c8b8
c8c7
d8a5
d8b6
d8c7
d8e8
f8e8
g8h8

## Board State Fen
2rq1rk1/1b1pbppp/p1n1p1n1/1p6/3PP3/P1N2N2/1PB1QPPP/R1BR2K1 b - - 4 13
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
a6a5
b5b4
c6b4
c6b8
c6d4
c6a5
c6a7
c6e5
e6e5
g6f4
g6h4
g6h8
g6e5
b7a8
d7d5
d7d6
e7a3
e7b4
e7c5
e7d6
e7h4
e7g5
e7f6
f7f5
f7f6
h7h5
h7h6
c8a8
c8b8
c8c7
d8a5
d8b6
d8c7
d8e8
f8e8
g8h8

## Board State Fen
2rq1rk1/1b1pbppp/p1n1p1n1/1p6/3PP3/P1N2N2/1PB1QPPP/R1BR2K1 b - - 4 13
assistant
b5b4