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

Action Reasoning:
The goal is to place block 'c' on the table, so we should put it down to proceed with stacking other blocks on it.

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

Action Chosen:
put-down(c)
