Current State ID: 3
Current State Description: Block A is on the table and clear. Block B is in the hand and no longer clear. Block C is on the table and now clear. Block D is on the table and clear. The hand is holding block B.

Child State ID: 8
Action Taken: stack(block_b, block_d)
State Description: Block A is on the table and clear. Block B is on block D and clear. Block C is on the table and clear. Block D is on the table and not clear. The hand is empty.

Child State ID: 9
Action Taken: stack(block_b, block_c)
State Description: Block A is on the table and clear. Block B is now on block C and clear. Block C is on the table but not clear as it supports block B. Block D is on the table and clear. The hand is empty.

