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
h2h4
h2h3
a2a4
a2a3
f2f3
g2g4
g2g3
g1h1
g1f1
c4b3
c4a6
c4b5
c4f1
c4e2
c4d3
c4e6
c4d5
f4f5
b7a7
b7b1
b7b2
b7b3
b7b4
b7b5
b7b6
b7d7
b7c7
b7b8

## Board State Fen
r7/1R1bkppp/2p1p3/p7/2B2P2/2P5/P4PPP/6K1 w - a6 0 19
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
h2h4
h2h3
a2a4
a2a3
f2f3
g2g4
g2g3
g1h1
g1f1
c4b3
c4a6
c4b5
c4f1
c4e2
c4d3
c4e6
c4d5
f4f5
b7a7
b7b1
b7b2
b7b3
b7b4
b7b5
b7b6
b7d7
b7c7
b7b8

## Board State Fen
r7/1R1bkppp/2p1p3/p7/2B2P2/2P5/P4PPP/6K1 w - a6 0 19
assistant
c4d3