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
d3a3
d3b3
d3c3
d3d1
d3d2
d3d8
d3d7
d3d6
d3d5
d3d4
e3e4
f3g4
f3g3
f3g2
f3f2
f3e2
f4f5

## Board State Fen
8/4kp2/6p1/6P1/r4P2/3RPK2/8/8 w - - 15 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
d3a3
d3b3
d3c3
d3d1
d3d2
d3d8
d3d7
d3d6
d3d5
d3d4
e3e4
f3g4
f3g3
f3g2
f3f2
f3e2
f4f5

## Board State Fen
8/4kp2/6p1/6P1/r4P2/3RPK2/8/8 w - - 15 54
assistant
e3e4