Current State ID: 43
Current State Description: Block 'a' is now held in the hand, block 'd' is clear and on the table, block 'c' is on top of block 'b', and block 'b' is supporting block 'c'. The hand is no longer empty.

Child State ID: 49
Action Taken: stack(a, d)
State Description: Block 'a' is now on top of block 'd', block 'd' is supporting block 'a' and is on the table. Block 'c' is on top of block 'b', and block 'b' is supporting block 'c'. The hand is empty.

