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
c4b4
c4c1
c4c2
c4c3
c4c5
d4e5
d4e4
d4e3
d4d5
d4d3
c6c5

## Board State Fen
8/8/R1p5/1p6/1Prk4/1K6/8/8 b - - 17 114
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
c4b4
c4c1
c4c2
c4c3
c4c5
d4e5
d4e4
d4e3
d4d5
d4d3
c6c5

## Board State Fen
8/8/R1p5/1p6/1Prk4/1K6/8/8 b - - 17 114
assistant
d4d5