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
a2a4
a2a3
h3h4
f4c1
f4d2
f4e3
f4b8
f4c7
f4d6
f4e5
f4h2
f4g3
f4h6
f4g5
d5e5
d5e4

## Board State Fen
8/3k4/6p1/1p1K3p/5B2/5P1P/P4b2/8 w - - 0 66
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
a2a4
a2a3
h3h4
f4c1
f4d2
f4e3
f4b8
f4c7
f4d6
f4e5
f4h2
f4g3
f4h6
f4g5
d5e5
d5e4

## Board State Fen
8/3k4/6p1/1p1K3p/5B2/5P1P/P4b2/8 w - - 0 66
assistant
d5e5