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
c6b6
c6c3
c6c4
c6c5
c6c8
c6c7
d6c4
d6c8
d6e4
d6b5
d6f5
b7b5
b7b6
e7e5
e7e6
f7f5
f7f6
g7g5
g7g6
h7h5
h7h6
e8d8
e8d7
h8g8

## Board State Fen
4kb1r/1p2pppp/p1rn4/8/8/NPP1B3/1P3PPP/3R1RK1 b k - 4 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
a6a5
c6b6
c6c3
c6c4
c6c5
c6c8
c6c7
d6c4
d6c8
d6e4
d6b5
d6f5
b7b5
b7b6
e7e5
e7e6
f7f5
f7f6
g7g5
g7g6
h7h5
h7h6
e8d8
e8d7
h8g8

## Board State Fen
4kb1r/1p2pppp/p1rn4/8/8/NPP1B3/1P3PPP/3R1RK1 b k - 4 17
assistant
h7h5