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
e1e2
f1h1
f1g1
b2a1
b2a3
b2c1
b2f6
b2e5
b2d4
b2c3
c2c3
f2f4
f2f3
g2h3
g2h1
g2g1
g2f3
h2h4
h2h3
d3d4
e3d1
e3d5
e3f5
e3g4
g3g4
a4a5
c4b6
c4d2
c4d6
c4a3
c4a5
c4e5

## Board State Fen
r2r4/p3bkp1/2n1pp2/2pn3p/PpN5/1P1PN1P1/1BP2PKP/4RR2 w - h6 0 21
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
e1e2
f1h1
f1g1
b2a1
b2a3
b2c1
b2f6
b2e5
b2d4
b2c3
c2c3
f2f4
f2f3
g2h3
g2h1
g2g1
g2f3
h2h4
h2h3
d3d4
e3d1
e3d5
e3f5
e3g4
g3g4
a4a5
c4b6
c4d2
c4d6
c4a3
c4a5
c4e5

## Board State Fen
r2r4/p3bkp1/2n1pp2/2pn3p/PpN5/1P1PN1P1/1BP2PKP/4RR2 w - h6 0 21
assistant
f2f4