Current State ID: 61
Current 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 held by the hand and not clear. The hand is not empty.

Child State ID: 74
Action Taken: stack(block_d, block_c)
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 not clear, with block D stacked on it. Block D is on block C and clear. The hand is empty.

