Attempt Number: 2
Error Message: The action and resulting child state have already been explored.

Action Reasoning:
The robot is currently at tile_1-1 and needs to move to tile_1-0 to start painting the first row. Since the robot is holding the white paint gun and the goal state requires tile_0-0 to be painted black, the robot should first move to tile_1-0. This is the shortest path to reach the starting point for painting the first row. Once at tile_1-0, the robot can change its paint gun color to black, which is the required color for tile_0-0.

New State Description:
Robot1 has moved from tile_1-1 to tile_1-0. Tile_1-1 is now clear, and tile_1-0 is occupied by the robot. The robot is still holding the white paint gun.

Action Chosen:
left(robot1, tile_1-1, tile_1-0)
