Current State ID: 11
Current State Description: Block `a` is on block `d` 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 supporting block `a`. The hand is empty.

Child State ID: 14
Action Taken: pick-up(b)
State Description: Block `a` is on block `d` and clear. Block `b` is in the hand and not clear. Block `c` is on the table and clear. Block `d` is on the table and supporting block `a`. The hand is holding block `b`.

