O2020N6
y
1
2
p/
3
4
xf
5
6
7
xf
8
9
p/@
10
11
xf
12
13
14
xf
15
16
/
17
18
xf
19
20
21
xf
22
23
/
24
25
xf
26
27
28
xf
29
30
/