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
e1a5
e1b4
e1c3
e1d2
e1b1
e1c1
e1d1
e1f1
e1e3
e1e2
g1h1
g1f1
a2a3
a1d1
a1c1
a1b1
b2b4
b2b3
g2g4
g2g3
h2h4
h2h3
f3e5
f3g5
f3d2
f3d4
f3h4
a4d1
a4c2
a4b3
a4c6
a4b5
c4c5
e4d4
e4e2
e4e3
e4h4
e4g4
e4f4
e4e5

## Board State Fen
3r1rk1/1pqb1ppp/p1n5/4p3/B1P1R3/5N2/PP3PPP/R3Q1K1 w - - 0 18
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
e1a5
e1b4
e1c3
e1d2
e1b1
e1c1
e1d1
e1f1
e1e3
e1e2
g1h1
g1f1
a2a3
a1d1
a1c1
a1b1
b2b4
b2b3
g2g4
g2g3
h2h4
h2h3
f3e5
f3g5
f3d2
f3d4
f3h4
a4d1
a4c2
a4b3
a4c6
a4b5
c4c5
e4d4
e4e2
e4e3
e4h4
e4g4
e4f4
e4e5

## Board State Fen
3r1rk1/1pqb1ppp/p1n5/4p3/B1P1R3/5N2/PP3PPP/R3Q1K1 w - - 0 18
assistant
a4c6