Parent State ID: 28
State Depth: 6
Action Taken: put-down(d)
Action Reasoning: To achieve the goal state, we need to place block d on the table first, as it is currently held in the hand. This will allow us to stack block a on top of block d in the next step.
State Description: Block d is now on the table and clear. Block a is clear and on the table. Block b remains on block c, and both are on the table. The hand is empty.
Action Path: ['unstack(c, b)', 'put-down(c)', 'pick-up(b)', 'stack(b, c)', 'unstack(d, a)', 'put-down(d)']

INACTIVE REASON: Pruned in beam search
