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
a4a2
a4a3
a4e4
a4d4
a4c4
a4b4
f6f5
h5h4
c7a7
c7b7
c7c3
c7c4
c7c5
c7c6
c7e7
c7d7
c7c8
f7g8
f7g7
f7g6
f7f8
f7e8
f7e7

## Board State Fen
8/2r2k2/R4p2/p3p2p/r3P1p1/2P1K1P1/P1R2P1P/8 b - - 21 48
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
a4a2
a4a3
a4e4
a4d4
a4c4
a4b4
f6f5
h5h4
c7a7
c7b7
c7c3
c7c4
c7c5
c7c6
c7e7
c7d7
c7c8
f7g8
f7g7
f7g6
f7f8
f7e8
f7e7

## Board State Fen
8/2r2k2/R4p2/p3p2p/r3P1p1/2P1K1P1/P1R2P1P/8 b - - 21 48
assistant
c7c4