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

Action Reasoning:
Passenger p4 needs to be moved to floor 3. Boarding p4 onto slow0-0 at floor 1, where they are located, and moving them to floor 3 will be efficient.

New State Description:
- fast0: On floor 3 (n3), 0/2 passengers, empty.- fast1: On floor 0 (n0), 0/2 passengers, empty.- slow0-0: On floor 1 (n1), 1/1 passengers, contains p4.- slow1-0: On floor 3 (n3), 0/1 passengers, empty.- p0: On floor 0 (n0).- p1: On floor 3 (n3).- p2: On floor 2 (n2).- p3: On floor 0 (n0).- p4: Onboard slow0-0.- p5: On floor 2 (n2).

Action Chosen:
board(p4, slow0-0, n1, 0, 1)
