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

Action Reasoning:
Fast elevator fast1 is already at floor 4 where p3 is located, so we can board p3 onto fast1 to move them efficiently to floor 5, which is closer to the goal state.

New State Description:
- fast0: At floor 2 (n2), 0/2 passengers.- fast1: At floor 4 (n4), 1/2 passengers with p3 onboard.- 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: Onboard fast1.- p4: On floor 2 (n2).- p5: On floor 0 (n0).- p6: On floor 2 (n2).

Action Chosen:
(board p3 fast1 n4 0 1)
