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
c4a2
c4b3
c4a6
c4b5
c4f1
c4e2
c4d3
c4d5
c5a5
c5b5
c5h5
c5g5
c5f5
c5e5
c5d5
e6e5
f6f5
h7h5
h7h6
g8h8
g8g7
g8f8

## Board State Fen
6k1/2R2p1p/2p1pp2/2r5/P1b4P/6P1/5PB1/6K1 b - - 2 31
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
c4a2
c4b3
c4a6
c4b5
c4f1
c4e2
c4d3
c4d5
c5a5
c5b5
c5h5
c5g5
c5f5
c5e5
c5d5
e6e5
f6f5
h7h5
h7h6
g8h8
g8g7
g8f8

## Board State Fen
6k1/2R2p1p/2p1pp2/2r5/P1b4P/6P1/5PB1/6K1 b - - 2 31
assistant
c4d5