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
b2b4
b2b3
d4d5
d4d3
d4c5
d4c4
d4c3
a5e1
a5d2
a5c3
a5b4
a5d8
a5c7
a5b6

## Board State Fen
8/7p/5p1P/B7/b2K1k2/8/1P6/8 w - - 0 48
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
b2b4
b2b3
d4d5
d4d3
d4c5
d4c4
d4c3
a5e1
a5d2
a5c3
a5b4
a5d8
a5c7
a5b6

## Board State Fen
8/7p/5p1P/B7/b2K1k2/8/1P6/8 w - - 0 48
assistant
a5d2