────┐ ┌──┐ ┌────┐ ┌──┐ ┌────┐ ┌ ⋅ ⋅ ⋅ │ │ │ │ │ │ │ │ │ │ └───────┘ └────┘ └──────┘ └──────────────┘ └──────┘ 40 | 70 |20| 40 | 40 | 60 |20| 140 | 40 | 60 | ⋅ ⋅ ⋅
