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
e4b1
e4c2
e4d3
e4c6
e4d5
e4f3
f5e3
f5e7
f5g3
f5d4
f5d6
f5h4
f5h6
a6a5
a7f2
a7e3
a7d4
a7c5
a7b6
a7b8
b7b5
b7b6
f7f6
g7g5
g7g6
h7h5
h7h6
a8e8
a8d8
a8c8
a8b8
f8b8
f8c8
f8d8
f8e8
g8h8

## Board State Fen
r4rk1/bp3ppp/p7/5n2/2N1b3/2P2N2/PP3PPP/R1BR2K1 b - - 3 19
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
e4b1
e4c2
e4d3
e4c6
e4d5
e4f3
f5e3
f5e7
f5g3
f5d4
f5d6
f5h4
f5h6
a6a5
a7f2
a7e3
a7d4
a7c5
a7b6
a7b8
b7b5
b7b6
f7f6
g7g5
g7g6
h7h5
h7h6
a8e8
a8d8
a8c8
a8b8
f8b8
f8c8
f8d8
f8e8
g8h8

## Board State Fen
r4rk1/bp3ppp/p7/5n2/2N1b3/2P2N2/PP3PPP/R1BR2K1 b - - 3 19
assistant
a8e8