i
h
l
j
j
M
2
2
2
2
____
1
2
____
3
____
3
2
3
2
3
4
____
3
____
4
4
3
4
____
3
6
____
6
____
| i | h | l | j |
| j |
| M |
| 2 | 2 | 2 | 2 | ____ | 1 |
|
|
| 2 | ____ | 3 | ____ | ||||
| 3 | 2 | 3 | 2 |
| 3 |
|
|
| 4 | ____ | 3 | ____ | ||||
| 4 | 4 | 3 | 4 | ____ | 3 |
|
|
| 6 | ____ | 6 | ____ |