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
e7a7
e7b7
e7c7
e7d7
e7e4
e7e5
e7e6
e7f7
e7e8
g4g5
h2g3
e3c1
e3d2
e3a7
e3b6
e3c5
e3d4
e3h6
e3g5
e3f4
f2f4
f2f3
h3h4
a1b1
a1a3
a1a2

## Board State Fen
1r4k1/4Rpp1/7p/p2b4/P5P1/4B2P/5P1K/Rr6 w - - 4 28
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
e7a7
e7b7
e7c7
e7d7
e7e4
e7e5
e7e6
e7f7
e7e8
g4g5
h2g3
e3c1
e3d2
e3a7
e3b6
e3c5
e3d4
e3h6
e3g5
e3f4
f2f4
f2f3
h3h4
a1b1
a1a3
a1a2

## Board State Fen
1r4k1/4Rpp1/7p/p2b4/P5P1/4B2P/5P1K/Rr6 w - - 4 28
assistant
a1b1