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
a2a3
f2b2
f2c2
f2d2
f2e2
f2f1
f2h2
f2g2
f2f8
f2f7
f2f6
f2f5
f2f4
f2f3
e3f3
e3e2
e3d3
e3d2

## Board State Fen
8/8/6k1/8/r7/4K3/P4R2/8 w - - 3 66
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
a2a3
f2b2
f2c2
f2d2
f2e2
f2f1
f2h2
f2g2
f2f8
f2f7
f2f6
f2f5
f2f4
f2f3
e3f3
e3e2
e3d3
e3d2

## Board State Fen
8/8/6k1/8/r7/4K3/P4R2/8 w - - 3 66
assistant
e3d3