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
c5d6
c5d5
c5b6
c5b5
f5f4
e6d4
e6d8
e6f4
e6f8
e6g5
e6g7
c7c6

## Board State Fen
4R3/2p5/4n3/1Pk2p2/8/2K5/8/8 b - - 6 74
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
c5d6
c5d5
c5b6
c5b5
f5f4
e6d4
e6d8
e6f4
e6f8
e6g5
e6g7
c7c6

## Board State Fen
4R3/2p5/4n3/1Pk2p2/8/2K5/8/8 b - - 6 74
assistant
e6f4