Current State ID: 1
Current State Description: Block d is in the hand, block a is clear and on top of block c, block c is on top of block b, and block b is on the table. The hand is holding block d.

Child State ID: 3
Action Taken: put-down(d)
State Description: Block d is on the table and clear. Block a is clear and on top of block c. Block c is on top of block b. Block b is on the table. The hand is empty.

