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
a2a4
a2b3
a2a3
g2g4
g2g3
h2h4
h2h3
f4g4
f4g3
f4f5
f4f3
f4e4
f4e3
c5a5
c5b5
c5c1
c5c2
c5c3
c5c4
c5h5
c5g5
c5f5
c5e5
c5d5
c5c8
c5c7
c5c6

## Board State Fen
8/1r3pk1/5p1p/2R5/5K2/1b6/P5PP/8 w - - 0 38
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
a2a4
a2b3
a2a3
g2g4
g2g3
h2h4
h2h3
f4g4
f4g3
f4f5
f4f3
f4e4
f4e3
c5a5
c5b5
c5c1
c5c2
c5c3
c5c4
c5h5
c5g5
c5f5
c5e5
c5d5
c5c8
c5c7
c5c6

## Board State Fen
8/1r3pk1/5p1p/2R5/5K2/1b6/P5PP/8 w - - 0 38
assistant
a2b3