Current State ID: 4
Current State Description: Block c is held in the hand and is no longer on the table or clear. Block b is on the table and clear. Block a is on the table and is clear. Block d is on the table and is clear. The hand is not empty.

Child State ID: 5
Action Taken: stack(c, b)
State Description: Block C is on top of Block B and is clear. Block B is no longer clear. Block A is on the table and is clear. Block D is on the table and is clear. The hand is empty.

Child State ID: 6
Action Taken: put-down(c)
State Description: Block c is on the table and clear. Block b is on the table and clear. Block a is on the table and is clear. Block d is on the table and is clear. The hand is empty.

