Parent State ID: 4
State Depth: 3
Action Taken: unstack(a, b)
Action Reasoning: To achieve the goal state where block C is on block A, we need to clear block A by unstacking it from block B. This will allow us to stack block C on block A in the next steps.
State Description: Block a is on the table and clear, block b is on the table and clear, block c is on the table and clear, block d is on the table and clear. The hand is holding block a.
Action Path: ['unstack(d, c)', 'put-down(d)', 'unstack(a, b)']
