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

Action Reasoning:
Passenger p2 needs to board the fast elevator (fast1) at floor n4, which is currently at its capacity of 1 out of 2. Boarding p2 will fill the elevator to its capacity, allowing us to continue towards the goal state.

New State Description:
- fast0: At floor n0, 0/2 passengers.- fast1: At floor n4, 2/2 passengers (p3 and 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 board fast1.- p4: On floor n1.- p5: On floor n3.

Action Chosen:
(board p2 fast1 n4 n1 n2)
