Parent State ID: 50
State Depth: 10
Action Taken: put-down(d)
Action Reasoning: To progress towards the goal, we should place 'd' on the table, freeing the hand to manipulate other blocks.
State Description: The hand is empty. Block 'd' is now clear and on the table. Block 'b' is clear and on the table. Block 'a' is on block 'c', and block 'c' is on the table. The diagram will show block 'd' on the table next to block 'b'.
Action Path: ['unstack(c, d)', 'put-down(c)', 'unstack(d, a)', 'stack(d, b)', 'pick-up(c)', 'put-down(c)', 'pick-up(a)', 'stack(a, c)', 'unstack(d, b)', 'put-down(d)']

INACTIVE REASON: deactivated because diagram generation failed or invalid action chosen: Action does not directly align with the goal state where 'd' should be on 'b'.
