Parent State ID: 80
State Depth: 12
Action Taken: stack(block_b, block_d)
Action Reasoning: To progress towards the goal state, we need to stack block B on block D, which is currently clear and on top of block C. This will help us build the desired stack structure.
State Description: Block A is on the table and clear. Block B is on block D and clear. 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 empty.
Action Path: ['unstack(block_b, block_c)', 'stack(block_b, block_d)', 'unstack(block_b, block_d)', 'stack(block_b, block_d)', 'unstack(block_b, block_d)', 'stack(block_b, block_c)', 'unstack(block_b, block_c)', 'put-down(block_b)', 'pick-up(block_d)', 'stack(block_d, block_c)', 'pick-up(block_b)', 'stack(block_b, block_d)']

successfully verified the action of new state 81 with the path: The last action `stack(block_b, block_d)` is valid as all preconditions are met, and it moves the state closer to the goal. The current state's natural language description and visualization accurately reflect the sequence of actions taken.
