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
a5b4
d5a2
d5b3
d5c4
d5a8
d5b7
d5c6
d5g2
d5f3
d5e4
d5e6
f6f5
h6h5
f7g8
f7g6
f7f8
f7e8
f7e7
f7e6
g7g5
g7g6
b8a8
b8b4
b8b5
b8b6
b8b7
b8h8
b8g8
b8f8
b8e8
b8d8
b8c8

## Board State Fen
1r6/5kp1/5p1p/p2b4/PP4P1/2B3K1/5PP1/1R6 b - - 0 39
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
a5b4
d5a2
d5b3
d5c4
d5a8
d5b7
d5c6
d5g2
d5f3
d5e4
d5e6
f6f5
h6h5
f7g8
f7g6
f7f8
f7e8
f7e7
f7e6
g7g5
g7g6
b8a8
b8b4
b8b5
b8b6
b8b7
b8h8
b8g8
b8f8
b8e8
b8d8
b8c8

## Board State Fen
1r6/5kp1/5p1p/p2b4/PP4P1/2B3K1/5PP1/1R6 b - - 0 39
assistant
d5e4