Current State ID: 48
Current State Description: The hand is holding block 'a'. Block 'c' is now clear and on the table. Block 'b' is supporting block 'd' and is not clear. Block 'd' is on block 'b' and is clear.

Child State ID: 56
Action Taken: stack(a, c)
State Description: The hand is now empty. Block 'a' is on block 'c', and block 'c' is supporting block 'a' and is no longer clear. Block 'b' is supporting block 'd' and is not clear. Block 'd' is on block 'b' and is clear.

