Attempt Number: 4
Error Message: Action not unique compared to other actions chosen from this state before. Choose a new action

Action Reasoning:
The next action in the plan is to board passenger p3 onto fast1 at floor n4, filling the elevator to its capacity. This aligns with the goal to move passengers to their destination floors efficiently.

New State Description:
- **fast0**: A fast elevator at floor 0 (n0), with 0 passengers and a capacity of 2.- **fast1**: A fast elevator at floor 4 (n4), now holding passengers p2 and p3, reaching its capacity of 2.- **slow0-0**: A slow elevator at floor 1 (n1), with 0 passengers and a capacity of 1.- **slow1-0**: A slow elevator at floor 3 (n3), with 0 passengers and a capacity of 1.- **p0**: On floor 1 (n1).- **p1**: On floor 1 (n1).- **p2**: Onboard fast1 at floor 4 (n4).- **p3**: Onboard fast1 at floor 4 (n4).- **p4**: On floor 1 (n1).- **p5**: On floor 3 (n3).

Action Chosen:
(board p3 fast1 n4 n1 n2)
