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
a7a5
a7a6
d6a3
d6b4
d6c5
d6b8
d6c7
d6g3
d6f4
d6e5
d6e7
c6b4
c6b8
c6d4
c6a5
c6e5
c6e7
g7g5
g7g6
b7b5
b7b6
a8c8
a8b8
f7f5
f7f6
h6h5
e6e5
d8a5
d8b6
d8c7
d8h4
d8g5
d8f6
d8e7
d8b8
d8c8
d8d7
d8e8
f8e8
g8h8

## Board State Fen
r2q1rk1/pp3pp1/2nbp2p/3p4/3P4/2PB1NP1/PP3PP1/R2QK2R b KQ - 0 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
a7a5
a7a6
d6a3
d6b4
d6c5
d6b8
d6c7
d6g3
d6f4
d6e5
d6e7
c6b4
c6b8
c6d4
c6a5
c6e5
c6e7
g7g5
g7g6
b7b5
b7b6
a8c8
a8b8
f7f5
f7f6
h6h5
e6e5
d8a5
d8b6
d8c7
d8h4
d8g5
d8f6
d8e7
d8b8
d8c8
d8d7
d8e8
f8e8
g8h8

## Board State Fen
r2q1rk1/pp3pp1/2nbp2p/3p4/3P4/2PB1NP1/PP3PP1/R2QK2R b KQ - 0 13
assistant
f8e8