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
a4d1
a4c2
a4b3
a4e8
a4d7
a4c6
a4b5
e5d3
e5d7
e5f3
e5f7
e5c4
e5c6
e5g4
e5g6
a6c4
a6b5
a6a5
a6d6
a6c6
a6b6
f6f5
b7b5
b7b6
g7g5
g7g6
h7h5
h7h6
a8e8
a8d8
a8c8
a8b8
f8b8
f8c8
f8d8
f8e8
f8f7
g8h8
g8f7

## Board State Fen
r4rk1/pp4pp/q3pp2/2P1n3/b1P1PN2/P1Q1BP2/6PP/2R2RK1 b - - 3 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
a4d1
a4c2
a4b3
a4e8
a4d7
a4c6
a4b5
e5d3
e5d7
e5f3
e5f7
e5c4
e5c6
e5g4
e5g6
a6c4
a6b5
a6a5
a6d6
a6c6
a6b6
f6f5
b7b5
b7b6
g7g5
g7g6
h7h5
h7h6
a8e8
a8d8
a8c8
a8b8
f8b8
f8c8
f8d8
f8e8
f8f7
g8h8
g8f7

## Board State Fen
r4rk1/pp4pp/q3pp2/2P1n3/b1P1PN2/P1Q1BP2/6PP/2R2RK1 b - - 3 18
assistant
a8d8