x
0
x
1
x
2
|
x
0
'
x
1
'
x
2
'
-
-
-
---
-
-
-
0
0
0
|
1
1
0
0
0
1
|
1
1
0
0
1
0
|
0
0
0
0
1
1
|
1
1
1
1
0
0
|
1
1
0
0
0
1
|
1
0
0