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

Action Reasoning:
We need to board passengers p2 and p3 onto fast1 at floor n4, as they need to be transported to their respective destination floors. This aligns with the next step in the plan.

New State Description:
- fast0: At floor n0, 0/2 passengers.- fast1: At floor n4, 1/2 passengers (p2 on board).- slow0-0: At floor n0, 0/1 passengers.- slow1-0: At floor n3, 0/1 passengers.- p0: On floor n0.- p1: On floor n1.- p2: On board fast1.- p3: On floor n4.- p4: On floor n1.- p5: On floor n3.

Action Chosen:
(board p2 fast1 n4 n0 n1)
