Parent State ID: 0
State Depth: 1
Action Taken: unstack(c, d)
Action Reasoning: To achieve the goal state, we need to move block 'c' to the table first. The best action is to unstack 'c' from 'd' because 'c' is clear and the hand is empty.
State Description: There are four blocks: a, b, c, and d. The hand is holding block c. Block a is on the table. Block d is on top of block a and is now clear. Block b is on the table and is clear. Block c is no longer on block d and is not clear.
Action Path: ['unstack(c, d)']
