Add and Take Away
Add + 3 levels Take away - 3 levels
Sum Dispenser + Level 1: TU + U + Level 2: Carrying U + Level 3: Carrying TU + Level 4: Add HTU
- Level 1: TU - U - Level 2: TU - U - Level 3: Borrowing T - Level 4: HTU - TU (Borrowing)