...above code is:
```
[(1, (0, 1)), (2, (1, 0)), (3, (0, 2)), (4, (1, 1)), (5, (2, 0)), (6, (0, 3)), (7, (1, 2)), (8, (2, 1))]
```
This shows that the A\* algorithm found the solution to the 8 puzzle problem in 8 steps.
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*...