Parent State ID: 47
State Depth: 12
Action Taken: stack(d, c)
Action Reasoning: To achieve the goal state, block 'd' needs to be placed on block 'c'. Since 'd' is currently held, the next logical step is to stack 'd' on 'c'.
State Description: Block 'a' is on top of block 'b'. Block 'b' is on the table and supporting block 'a'. Block 'c' is on the table and supporting block 'd'. Block 'd' is on top of block 'c' and clear. The hand is empty. The diagram would show block 'a' on block 'b', block 'c' on the table with block 'd' on top of it, and the hand empty.
Action Path: ['unstack(d, a)', 'put-down(d)', 'unstack(a, c)', 'put-down(a)', 'pick-up(d)', 'put-down(d)', 'unstack(c, b)', 'put-down(c)', 'pick-up(a)', 'stack(a, b)', 'pick-up(d)', 'stack(d, c)']
