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

Action Reasoning:
To achieve the goal state, we need to stack the blocks in the correct order. Starting with block A, which is clear and on the table, we will put it on block B, which is also currently clear on block D. This will begin achieving the correct stack arrangement.

New State Description:
Block A is in hand. Block B is clear and on block D. Block C is on the table and not clear, with block D stacked on it. Block D is on block C and not clear. The hand is holding block A.

Action Chosen:
pick-up(block_a)
