Parent State ID: 33
State Depth: 9
Action Taken: pick-up(d)
Action Reasoning: To move towards the goal state, we need to place block 'd' on block 'b'. First, we must pick up block 'd' from the table since it is clear and the hand is empty.
State Description: The hand is now holding block 'd'. Block 'b' is on block 'a' and is clear. Block 'a' is not clear. Block 'c' remains under block 'a' and is not clear. Block 'd' is no longer on the table and is not clear.
Action Path: ['unstack(c, d)', 'put-down(c)', 'unstack(d, a)', 'put-down(d)', 'pick-up(a)', 'stack(a, c)', 'pick-up(b)', 'stack(b, a)', 'pick-up(d)']
