Parent State ID: 20
State Depth: 6
Action Taken: put-down(a)
Action Reasoning: To progress toward the goal state, we need to clear the hand by placing block 'a' on block 'd', which matches part of the goal configuration.
State Description: Block 'a' is on the table and clear. Blocks 'b', 'c', and 'd' remain clear and on the table. The hand is now empty.
Action Path: ['unstack(d, a)', 'put-down(d)', 'unstack(c, b)', 'put-down(c)', 'pick-up(a)', 'put-down(a)']

INACTIVE REASON: deactivated because diagram generation failed or invalid action chosen: 
