Parent State ID: 16
State Depth: 6
Action Taken: stack(a, c)
Action Reasoning: To achieve the goal state, we need to place block 'a' on block 'c'. Since the hand is currently holding block 'a' and block 'c' is clear, the best action is to stack 'a' on 'c'.
State Description: The hand is now empty. Block 'a' is on block 'c' and is clear. Block 'c' is no longer clear. Blocks b and d remain on the table and clear.
Action Path: ['unstack(c, d)', 'put-down(c)', 'unstack(d, a)', 'put-down(d)', 'pick-up(a)', 'stack(a, c)']
