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
h2h4
h2h3
f3g3
f3g2
f3e4
f3e2
c4a2
c4b3
c4a6
c4b5
c4f1
c4e2
c4d3
c4g8
c4f7
c4e6
c4d5

## Board State Fen
8/8/3k1p1p/2b3p1/2B3P1/5K2/1P3P1P/8 w - - 2 40
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
h2h4
h2h3
f3g3
f3g2
f3e4
f3e2
c4a2
c4b3
c4a6
c4b5
c4f1
c4e2
c4d3
c4g8
c4f7
c4e6
c4d5

## Board State Fen
8/8/3k1p1p/2b3p1/2B3P1/5K2/1P3P1P/8 w - - 2 40
assistant
f3e4