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
e1a1
e1b1
e1c1
e1d1
e1g1
e1f1
e1e3
e1e2
h1g2
h1g1
h2h4
h2h3
g3g4
b5a4
b5a6
b5f1
b5e2
b5d3
b5c4
c6c7

## Board State Fen
6k1/4p2p/2Pp2p1/1B2b3/4P3/2r3P1/7P/4R2K w - - 1 43
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
e1a1
e1b1
e1c1
e1d1
e1g1
e1f1
e1e3
e1e2
h1g2
h1g1
h2h4
h2h3
g3g4
b5a4
b5a6
b5f1
b5e2
b5d3
b5c4
c6c7

## Board State Fen
6k1/4p2p/2Pp2p1/1B2b3/4P3/2r3P1/7P/4R2K w - - 1 43
assistant
e1b1