Current State ID: 9
Current State Description: Block 'a' is on the table and clear. Block 'b' is in the hand, not on block 'c', and not clear. Block 'c' is on the table and clear. Block 'd' is on the table and clear. The hand is holding block 'b'.

Child State ID: 10
Action Taken: put-down(block_b)
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.

