Current State ID: 14
Current State Description: The hand is holding block 'c'. Blocks a, b, and d are on the table and clear. Block c is no longer on the table or clear.

Child State ID: 20
Action Taken: put-down(c)
State Description: The hand is empty. Blocks a, b, c, and d are on the table and clear. Block c is now on the table and clear, reflecting the change in the diagram.

Child State ID: 21
Action Taken: stack(c, a)
State Description: The hand is empty. Block 'c' is on block 'a' and is clear. Blocks 'b' and 'd' are still on the table and clear. Block 'a' is no longer clear but is on the table. The diagram now shows 'c' on top of 'a'.

