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
a6b7
a6b5

## Board State Fen
R3b3/8/kp2P1p1/p7/4N3/1P1rr3/1K6/2R5 b - - 8 44
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
a6b7
a6b5

## Board State Fen
R3b3/8/kp2P1p1/p7/4N3/1P1rr3/1K6/2R5 b - - 8 44
assistant
a6b7