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

Action Reasoning:
To move closer to the goal state, stack block c onto the table and block d onto block c.

New State Description:
The hand is empty. Block a is on the table. Block b is on top of block a and is clear. Block c is now on the table and clear. Block d is on the table and clear.

Action Chosen:
put-down(c)
