# Write a python code to solve the 8-puzzle problem using the A* algorithm. The player can pick one…

Write a python code to solve the 8-puzzle problem using the A* algorithm. The player can pick one of the {Left, Right, Up, Down} actions to moves the blank tile.

The algorithm should:

• return the plan (the sequence of required actions)
• return the number of visited nodes

This is how you can define your goal state: Goal = [[0,1,2],[3,4,5],[6,7,8]].

your start state can be: [[1,4,2],[3,0,5],[6,7,8]]

The algorithm should be able to handle any given start states. Some states of the game may not be solvable. Assume that the user always input a solvable state.

Your code should ask the user which one of the following heuristic functions to use:

• a1: number of the misplaced tiles
• a2: manhattan distance

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