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
a6a5
a6e6
a6d6
a6c6
a6b6
a6a8
a6a7
f4e5
f2f3
a4a5
e3e4
h2h4
h2h3
g1h1
g1g2
g1f1

## Board State Fen
8/4k2p/R3p1p1/4bp2/P4P2/4P3/r4P1P/6K1 w - - 0 42
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
a6a5
a6e6
a6d6
a6c6
a6b6
a6a8
a6a7
f4e5
f2f3
a4a5
e3e4
h2h4
h2h3
g1h1
g1g2
g1f1

## Board State Fen
8/4k2p/R3p1p1/4bp2/P4P2/4P3/r4P1P/6K1 w - - 0 42
assistant
f4e5