Parent State ID: 18
State Depth: 7
Action Taken: unstack(c, b)
Action Reasoning: To achieve the goal state, we need to move block 'c' to the table so that block 'd' can be stacked on it. The best action is to unstack 'c' from 'b'.
State Description: Block 'a' is on the table and clear. Block 'c' is held in the hand. Block 'b' is on the table and clear. Block 'd' is on the table and clear. The hand is holding block 'c'.
Action Path: ['unstack(d, a)', 'put-down(d)', 'unstack(a, c)', 'put-down(a)', 'pick-up(d)', 'put-down(d)', 'unstack(c, b)']
