Parent State ID: 25
State Depth: 6
Action Taken: put-down(a)
Action Reasoning: The next step is to put down block 'a' on the table, making the hand empty, which sets up the ability to stack 'a' on 'd' and frees up the hand for future actions.
State Description: Blocks a, b, c, and d are clear and on the table. The hand is empty.
Action Path: ['unstack(c, b)', 'put-down(c)', 'unstack(d, a)', 'put-down(d)', 'pick-up(a)', 'put-down(a)']

INACTIVE REASON: Pruned in beam search
