|
B4
|
x
|
x
|
x
|
x
|
|||
|
x
|
x
|
x
|
x
|
||||
![]() |
|||||||
| |
x
|
x
|
x
|
x
|
x
|
||
![]() |
x
|
x
|
x
|
x
|
x
|
||