Attempt Number: 2
Error Message: Action not unique compared to other actions chosen from this state before. Choose a new action

Action Reasoning:
To move closer to the goal state, we should transport p3 on floor 4 to floor 5 where p2 is located. Fast1 is already at floor 5 and can be moved back to floor 4 to pick up p3 efficiently, using low travel cost.

New State Description:
- fast0: At floor 2 (n2), 0/2 passengers.- fast1: At floor 4 (n4), 0/2 passengers.- slow0-0: At floor 2 (n2), 0/1 passengers.- p0: On floor 2 (n2).- p1: On floor 1 (n1).- p2: On floor 5 (n5).- p3: On floor 4 (n4).- p4: On floor 2 (n2).- p5: On floor 0 (n0).- p6: On floor 2 (n2).

Action Chosen:
(move-down-fast fast1 n5 n4)
