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
a1a3
a1a2
b1a2
b1e4
b1d3
b1c2
b1e1
b1d1
b1c1
b1b7
b1b6
b1b5
b1b4
b1b3
b1b2
f1c1
f1d1
f1e1
g1h1
e2d1
e2a6
e2b5
e2c4
e2d3
e2h5
e2g4
e2f3
f2f3
g2g4
g2g3
h2h4
h2h3
a4a5
f5e3
f5e7
f5g3
f5g7
f5d4
f5d6
f5h4
f5h6

## Board State Fen
r2q1rk1/1p3p1p/p3bn2/5N2/P4p2/8/4BPPP/RQ3RK1 w - - 2 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
a1a3
a1a2
b1a2
b1e4
b1d3
b1c2
b1e1
b1d1
b1c1
b1b7
b1b6
b1b5
b1b4
b1b3
b1b2
f1c1
f1d1
f1e1
g1h1
e2d1
e2a6
e2b5
e2c4
e2d3
e2h5
e2g4
e2f3
f2f3
g2g4
g2g3
h2h4
h2h3
a4a5
f5e3
f5e7
f5g3
f5g7
f5d4
f5d6
f5h4
f5h6

## Board State Fen
r2q1rk1/1p3p1p/p3bn2/5N2/P4p2/8/4BPPP/RQ3RK1 w - - 2 21
assistant
f5h6