Current State ID: 34
Current State Description: Block `a` is on the table and clear. Block `b` is on the table and not clear, as it supports block `d`. Block `c` is on the table and clear. Block `d` is on block `b` and clear. The hand is empty.

Child State ID: 43
Action Taken: pick-up(a)
State Description: Block `a` is held by the hand and not clear. Block `b` is on the table and not clear, as it supports block `d`. Block `c` is on the table and clear. Block `d` is on block `b` and clear. The hand is holding block `a`.

