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
a1h1
a1g1
a1f1
a1e1
a1d1
a1c1
a1b1
a1a4
a1a3
a1a2
d4d5
g4g3
g4f5
g4f4
a5b6
a5a6

## Board State Fen
8/p2k2pp/1p3p2/PP6/3Pp1K1/4P3/7r/R7 w - - 0 41
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
a1h1
a1g1
a1f1
a1e1
a1d1
a1c1
a1b1
a1a4
a1a3
a1a2
d4d5
g4g3
g4f5
g4f4
a5b6
a5a6

## Board State Fen
8/p2k2pp/1p3p2/PP6/3Pp1K1/4P3/7r/R7 w - - 0 41
assistant
a5b6