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
a2a1
a2f2
a2e2
a2d2
a2c2
a2b2
a2a8
a2a7
a2a6
a2a5
a2a4
a2a3
f4f3
g4d1
g4e2
g4f3
g4c8
g4d7
g4e6
g4f5
g4h3
d5d6
d5c6
d5c4

## Board State Fen
4R3/8/8/3k3p/5pbP/8/r4BK1/8 b - - 13 86
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
a2a1
a2f2
a2e2
a2d2
a2c2
a2b2
a2a8
a2a7
a2a6
a2a5
a2a4
a2a3
f4f3
g4d1
g4e2
g4f3
g4c8
g4d7
g4e6
g4f5
g4h3
d5d6
d5c6
d5c4

## Board State Fen
4R3/8/8/3k3p/5pbP/8/r4BK1/8 b - - 13 86
assistant
g4f5