1
x1
x3
S1
x3
x3
S1
2
3
S3
x1
x2
B2
x1
A238
x1
S3
x1
x1
x1
x1
x1
S3
1
5
4
x1
x1
x1
x1
S3
x3
x1
S3
S3
6
7
x1
x1
x1
x1
S3
x3
x1
S3
S3
2
8
9
x1
S3
x1
x3
x1
S3
x1
x3
x1
S3
S3
S3
S3
10
11
9
10
x1
S3
x2
x1
x1
S1
x2
S3
S3
x2
S1
3
12
13
11
12
x1
S3
x2
x1
x1
S1
x2
S3
S3
x2
S1
14
x2
15
x2
S1
S1
13
x1
S2
x2
x2
14
x1
S2
x2
S3
4
16
14
17
15
x1
S2
x1
x1
S1
x2
x2
S2
S1
S3
5
18
19
S2
x1
S2
x1
S1
x1
S2
x1
S1
x2
S2
x1
S1
x1
S1
x2
S2
S2
6
21
20
S2
S2
x1
x1
x2
S1
x2
x1
S1
x2
S2
x2
S2
22
S2
x1
S2
x1
x2
S2
x2
S2
7
23
21
22
x1
x4
S1
x4
S1
21
22
24
20
23
x1
x1
S1
x2
x2
S1
8
25
26
24
S1
x1
25
x1
x1
S1
x1
x1
x2
S2
x2
x2
S2
S2
S2
9