Current State ID: 25
Current State Description: Block a is held in the hand. Blocks b, c, and d remain clear and on the table. The hand is no longer empty.

Child State ID: 33
Action Taken: stack(a, d)
State Description: Block 'a' is on top of block 'd', and both blocks 'b' and 'c' remain clear and on the table. The hand is now empty. In the diagram, block 'a' is stacked on block 'd', and the hand is no longer holding anything.

Child State ID: 34
Action Taken: put-down(a)
State Description: Blocks a, b, c, and d are clear and on the table. The hand is empty.

