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

Action Reasoning:
Fast0 is at floor 4 with passengers p0 and p3 waiting. Boarding both passengers brings them closer to their goals effectively.

New State Description:
- **fast0**: At floor 4 (n4), 1/2 passengers, with p3 waiting to board.- **fast1**: At floor 0 (n0), 1/2 passengers, contains p2 at destination.- **slow0-0**: At floor 2 (n2), 0/1 passengers, available.- **p0**: On board fast0 at floor 4.- **p1**: On floor 1 (n1), at destination.- **p2**: On board fast1 at floor 0, at destination.- **p3**: On floor 4 (n4), waiting for transport.- **p4**: On floor 2 (n2), waiting for transport.- **p5**: On floor 0 (n0), at destination.- **p6**: On floor 2 (n2), at destination.

Action Chosen:
(board p0 fast0 n4 0 1)
