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

Action Reasoning:
Loading passengers efficiently with available capacity is key to optimize trips. Let's board passenger p0 onto fast0, which can travel between floors and quickly help passengers reach their destinations.

New State Description:
- fast0: Fast elevator at floor 1 (n1), 1/2 passengers (p0 on board).- fast1: Fast elevator at floor 3 (n3), 1/2 passengers (p5 on board).- slow0-0: Slow elevator at floor 1 (n1), 0/1 passengers.- slow1-0: Slow elevator at floor 3 (n3), 0/1 passengers.- p0: On board fast0 at floor 1 (n1).- p1: On floor 1 (n1).- p2: On floor 4 (n4).- p3: On floor 4 (n4).- p4: On floor 1 (n1).- p5: On board fast1 at floor 3 (n3).

Action Chosen:
board(p0, fast0, n1, 0, 1)
