Parent State ID: 9
State Depth: 5
Action Taken: pick-up(c)
Action Reasoning: To achieve the goal state, we need to start building the stack with block 'c' at the bottom. Since 'c' is already clear and on the table, we can pick it up to begin stacking.
State Description: The hand is holding block 'c'. Blocks a, b, and d are on the table and clear. Block c is no longer on the table or clear.
Action Path: ['unstack(c, d)', 'put-down(c)', 'unstack(d, a)', 'put-down(d)', 'pick-up(c)']
