Current State ID: 30
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 on the table and clear. The hand is empty. The diagram would show all blocks on the table, each marked as clear, with the hand empty.

Child State ID: 35
Action Taken: pick-up(a)
State Description: Block 'a' is held in the hand. Block 'b' is on the table and clear. Blocks 'c' and 'd' are on the table and clear. The hand is holding block 'a'. The diagram would show block 'a' marked as held, with the hand no longer empty.

