Parent State ID: 41
State Depth: 8
Action Taken: stack(b, c)
Action Reasoning: To achieve the goal state, block 'b' needs to be placed on top of block 'c'. Since block 'b' is currently held, the next best action is to stack 'b' on 'c'.
State Description: Block 'a' is on top of block 'd', block 'b' is on top of block 'c', and both blocks 'a' and 'b' are clear. The hand is empty. In the diagram, block 'b' is now stacked on block 'c', completing the goal state.
Action Path: ['unstack(c, b)', 'put-down(c)', 'unstack(d, a)', 'put-down(d)', 'pick-up(a)', 'stack(a, d)', 'pick-up(b)', 'stack(b, c)']
