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
a1b1
a1a5
a1a4
a1a3
a1a2
c1a3
c1b2
c1d2
f1d1
f1e1
f1h1
f1g1
e2d1
e2b5
e2c4
e2d3
f2g3
f2g1
f2e1
g2g4
g2g3
h2h4
h2h3
e3e4
f3f4
b4a5
c5c6

## Board State Fen
r2r2k1/4bppp/4p3/ppP5/1P6/2n1PP2/4BKPP/R1B2R2 w - a6 0 23
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
a1b1
a1a5
a1a4
a1a3
a1a2
c1a3
c1b2
c1d2
f1d1
f1e1
f1h1
f1g1
e2d1
e2b5
e2c4
e2d3
f2g3
f2g1
f2e1
g2g4
g2g3
h2h4
h2h3
e3e4
f3f4
b4a5
c5c6

## Board State Fen
r2r2k1/4bppp/4p3/ppP5/1P6/2n1PP2/4BKPP/R1B2R2 w - a6 0 23
assistant
a1a5