Parent State ID: 23
State Depth: 6
Action Taken: stack(c, b)
Action Reasoning: The next best action is to stack block 'c' on block 'b' because it directly moves us closer to the goal state by placing block 'c' on the table with block 'b' on top of it.
State Description: Block 'c' is now on top of block 'b', making block 'b' no longer clear. Block 'a' remains on top of block 'd', and block 'd' is supporting block 'a'. The hand is now empty.
Action Path: ['unstack(d, a)', 'put-down(d)', 'pick-up(a)', 'stack(a, d)', 'unstack(c, b)', 'stack(c, b)']
