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
h6h5
b7a6
b7a8
b7c6
b6b5
d7c5
d7e5
d7b8
d7f6
e7a3
e7b4
e7c5
e7d6
e7d8
e7h4
e7g5
e7f6
e7e8
f7f5
f7f6
g7g5
g7g6
c8a8
c8b8
c8c1
c8c2
c8c3
c8c4
c8c5
c8c6
c8c7
c8e8
c8d8
f8d8
f8e8
g8h8

## Board State Fen
2r2rk1/pb1nqpp1/1p2p2p/3pP3/3P4/3B1P2/PP1NQ1PP/R2R2K1 b - - 0 17
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
h6h5
b7a6
b7a8
b7c6
b6b5
d7c5
d7e5
d7b8
d7f6
e7a3
e7b4
e7c5
e7d6
e7d8
e7h4
e7g5
e7f6
e7e8
f7f5
f7f6
g7g5
g7g6
c8a8
c8b8
c8c1
c8c2
c8c3
c8c4
c8c5
c8c6
c8c7
c8e8
c8d8
f8d8
f8e8
g8h8

## Board State Fen
2r2rk1/pb1nqpp1/1p2p2p/3pP3/3P4/3B1P2/PP1NQ1PP/R2R2K1 b - - 0 17
assistant
e7b4