Parent State ID: 14
State Depth: 8
Action Taken: stack(b c)
Action Reasoning: To achieve the goal state, block `b` needs to be on top of block `c`. Since block `b` is currently in the hand and block `c` is clear on the table, the best action is to stack block `b` on block `c`.
State Description: Block `a` is on block `d` and clear. Block `b` is on block `c` and clear. Block `c` is on the table and supporting block `b`. Block `d` is on the table and supporting block `a`. The hand is empty.
Action Path: ['unstack(d a)', 'put-down(d)', 'pick-up(a)', 'stack(a d)', 'unstack(c b)', 'put-down(c)', 'pick-up(b)', 'stack(b c)']

successfully verified the action of new state 20 with the path: The last action, stack(b c), is valid as the preconditions were met: the hand was holding b, and c was clear. The current state description and visualization accurately reflect the effects of the actions taken, with all objects correctly positioned and statuses shown.
