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
b3b1
b3b2
b3f3
b3e3
b3d3
b3c3
b3b8
b3b7
b3b6
b3b5
b3b4
g7h8
g7h7
g7g8
g7f8
g7f7
a3a2

## Board State Fen
8/6k1/R7/7p/5K1P/pr3P2/8/8 b - - 7 67
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
b3b1
b3b2
b3f3
b3e3
b3d3
b3c3
b3b8
b3b7
b3b6
b3b5
b3b4
g7h8
g7h7
g7g8
g7f8
g7f7
a3a2

## Board State Fen
8/6k1/R7/7p/5K1P/pr3P2/8/8 b - - 7 67
assistant
b3c3