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

Action Reasoning:
The first action in the valid plan is to board passenger p0 on slow0-0 at floor n1. This action is chosen to move p0 towards their destination on floor n0 while maximizing elevator usage.

New State Description:
- fast0 is at floor n0 with 0 passengers and a capacity of 2.- fast1 is at floor n3 with 0 passengers and a capacity of 2.- slow0-0 is at floor n1 with passenger p0 on board and a capacity of 1.- slow1-0 is at floor n3 with 0 passengers and a capacity of 1.- p0 is on board slow0-0 at floor n1.- p1 is at floor n1.- p2 is at floor n4.- p3 is at floor n4.- p4 is at floor n1.- p5 is at floor n3.

Action Chosen:
(board p0 slow0-0 n1 n0 n1)
