Current State ID: 26
Current State Description: The hand is holding block 'a', which is no longer on the table. Blocks 'b', 'c', and 'd' remain clear and on the table. The table supports blocks 'b', 'c', and 'd', but not 'a'. The hand is no longer empty.

Child State ID: 31
Action Taken: stack(a, c)
State Description: The hand is empty. Block 'a' is on top of block 'c'. Block 'a' is clear. Block 'b' is on the table and clear. Block 'c' is supporting block 'a' and is no longer clear. Block 'd' remains clear and on the table.

