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
b5b6
b5a5
c5c1
c5c2
c5c3
c5c4
c5g5
c5f5
c5e5
c5d5
c5c8
c5c7
c5c6
h5d5
h5e5
h5f5
h5g5
h5h8
h5h7
h5h6

## Board State Fen
1k6/1p2r3/8/1KR4R/4r2P/8/8/8 w - - 8 55
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
b5b6
b5a5
c5c1
c5c2
c5c3
c5c4
c5g5
c5f5
c5e5
c5d5
c5c8
c5c7
c5c6
h5d5
h5e5
h5f5
h5g5
h5h8
h5h7
h5h6

## Board State Fen
1k6/1p2r3/8/1KR4R/4r2P/8/8/8 w - - 8 55
assistant
c5c4