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
a1e1
a1d1
a1c1
a1b1
f1b1
f1c1
f1d1
f1e1
g1h1
a2a4
a2a3
d2c1
d2e1
d2b2
d2c2
d2d1
e2f4
e2c1
e2g3
f2f4
f2f3
g2g4
g2g3
h2h4
h2h3
c3c4
d3b1
d3c2
d3a6
d3b5
d3c4
e3h6
e3g5
e3f4
d4c5
d4e5
d4d5

## Board State Fen
r1bq1rk1/p4pbp/1p4p1/n1p1p3/3PP3/2PBB3/P2QNPPP/R4RK1 w - e6 0 13
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
a1e1
a1d1
a1c1
a1b1
f1b1
f1c1
f1d1
f1e1
g1h1
a2a4
a2a3
d2c1
d2e1
d2b2
d2c2
d2d1
e2f4
e2c1
e2g3
f2f4
f2f3
g2g4
g2g3
h2h4
h2h3
c3c4
d3b1
d3c2
d3a6
d3b5
d3c4
e3h6
e3g5
e3f4
d4c5
d4e5
d4d5

## Board State Fen
r1bq1rk1/p4pbp/1p4p1/n1p1p3/3PP3/2PBB3/P2QNPPP/R4RK1 w - e6 0 13
assistant
d4e5