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
b2b4
b2b3
c2c4
c2c3
e2f2
e2f1
e2e1
e2d2
e2d1
a7a3
a7a4
a7a5
a7a6
a7h7
a7g7
a7f7
a7e7
a7d7
a7c7
a7b7
a7a8
a2a4
a2a3

## Board State Fen
8/R7/1p5p/2p1k3/8/7r/PPP1K3/8 w - - 0 33
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
b2b4
b2b3
c2c4
c2c3
e2f2
e2f1
e2e1
e2d2
e2d1
a7a3
a7a4
a7a5
a7a6
a7h7
a7g7
a7f7
a7e7
a7d7
a7c7
a7b7
a7a8
a2a4
a2a3

## Board State Fen
8/R7/1p5p/2p1k3/8/7r/PPP1K3/8 w - - 0 33
assistant
a7b7