Attempt Number: 3
Error Message: Action not unique compared to other actions chosen from this state before. Choose a new action

Action Reasoning:
With p4 on fast0, moving fast0 up to floor 3 will allow us to position p4 correctly when it is time to move p0, p3, and p4 into their final positions more efficiently.

New State Description:
- fast0: On floor 3 (n3), 1/2 passengers, contains p4.- fast1: On floor 0 (n0), 0/2 passengers, empty.- slow0-0: On floor 1 (n1), 0/1 passengers, empty.- slow1-0: On floor 3 (n3), 0/1 passengers, empty.- p0: On floor 0 (n0).- p1: On floor 3 (n3).- p2: On floor 2 (n2).- p3: On floor 0 (n0).- p4: On board fast0 (n3).- p5: On floor 2 (n2).

Action Chosen:
move-up-fast(fast0, n1, n3)
