+ 4
----------
+ 8
----------
+ 4
----------
+ 3
----------
+ 4
----------
+ 5
----------
+ 4
----------
+ 2
----------
+ 4
----------
+ 3
----------
+ 4
----------
+ 8
----------
+ 4
----------
+ 1
----------
+ 4
----------
+ 1
----------
|
|||
| 2 + 4 ---------- |
4 + 8 ---------- |
8 + 4 ---------- |
4 + 3 ---------- |
| 6 + 4 ---------- |
4 + 5 ---------- |
7 + 4 ---------- |
4 + 2 ---------- |
| 4 + 4 ---------- |
4 + 3 ---------- |
6 + 4 ---------- |
4 + 8 ---------- |
| 5 + 4 ---------- |
4 + 1 ---------- |
4 + 4 ---------- |
4 + 1 ---------- |
|
|||