Current State ID: 6
Current State Description: The hand is holding block 'd'. Block 'a' is clear and on the table. Block 'b' is clear and on the table. Block 'c' is clear and on the table. The hand is not empty as it is holding block 'd'.

Child State ID: 9
Action Taken: stack(d, a)
State Description: The hand is empty. Block 'a' is supporting block 'd' and is on the table. Block 'b' is clear and on the table. Block 'c' is clear and on the table. Block 'd' is on block 'a' and is clear.

Child State ID: 10
Action Taken: put-down(d)
State Description: The hand is empty. Block 'a' is clear and on the table. Block 'b' is clear and on the table. Block 'c' is clear and on the table. Block 'd' is clear and on the table.

