Current State ID: 7
Current State Description: Block a is on the table and clear, block b is on the table and clear, block c is on the table and clear, block d is on the table and clear. The hand is holding block a.

Child State ID: 10
Action Taken: put-down(a)
State Description: Block a is on the table and clear, block b is on the table and clear, block c is on the table and clear, block d is on the table and clear. The hand is empty. The diagram now shows all blocks on the table with no block being held.

Child State ID: 11
Action Taken: stack(a, c)
State Description: Block a is on top of block c. Block b is on the table and clear. Block d is on the table and clear. Block c is no longer clear. The hand is empty.

