Current State ID: 23
Current State Description: The hand is empty. Block 'a' is on block 'c', making block 'a' not clear. Blocks 'b' and 'd' remain on the table and clear. Block 'c' is no longer clear as it supports block 'a'.

Child State ID: 26
Action Taken: pick-up(b)
State Description: The hand is holding block 'b'. Block 'a' is on block 'c', making block 'a' not clear. Block 'c' is supporting block 'a' and is not clear. Block 'd' remains on the table and clear. Block 'b' is no longer on the table and is not clear.

