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
a3b2
a3a2
b3b1
b3b2
b3f3
b3e3
b3d3
b3c3
b3b8
b3b7
b3b6
b3b5
b3b4

## Board State Fen
8/8/8/p6p/P3R2P/kr3P2/5K2/8 b - - 6 54
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
a3b2
a3a2
b3b1
b3b2
b3f3
b3e3
b3d3
b3c3
b3b8
b3b7
b3b6
b3b5
b3b4

## Board State Fen
8/8/8/p6p/P3R2P/kr3P2/5K2/8 b - - 6 54
assistant
b3b2