16
17
18
19
20 >
a
b
c
d
e
|
16 |
17 |
18 |
19 |
20 > |
|
|
|
|
|
|
|
|
|
a |
|
|
|
|
|
|
b |
|
|
|
|
|
|
c |
|
|
|
|
|
|
d |
|
|
|
|
|
|
e |
|
|
|
|
|
[PF230]