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
b4a2
b4a6
b4c2
b4c6
b4d3
b4d5
e6a6
e6b6
e6c6
e6d6
e6e5
e6g6
e6f6
e6e8
e6e7
h6h5
b7b5
b7b6
c7c5
c7c6
f7f5
f7f6
g7g5
g7g6
g8h8
g8h7
g8f8

## Board State Fen
6k1/1pp2pp1/4r2p/4R3/1nP5/1P1P1N1P/5PP1/6K1 b - - 0 23
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
b4a2
b4a6
b4c2
b4c6
b4d3
b4d5
e6a6
e6b6
e6c6
e6d6
e6e5
e6g6
e6f6
e6e8
e6e7
h6h5
b7b5
b7b6
c7c5
c7c6
f7f5
f7f6
g7g5
g7g6
g8h8
g8h7
g8f8

## Board State Fen
6k1/1pp2pp1/4r2p/4R3/1nP5/1P1P1N1P/5PP1/6K1 b - - 0 23
assistant
e6e5