0 1
1 2
2 2
2 3
2 4
0 1 2 3
0 1 2 4
---
===
0 1
1 0
---
 1 0
 1 0
 1 0
 1 0
 1 0
 1 0
 1 0
 1 0
 1 0
 1 0
===
0 1
1 0
1 2
2 3
3 4
4 5
5 6
6 7
7 8
8 9
9 10
---
 10 9
 8 9
 7 9
 6 9
 5 9
 4 9
 3 9
 2 9
 1 9
 0 9
===
0 1
0 1
1 2
2 3
3 4
4 5
5 6
6 7
7 8
8 9
9 10
---
 10 9
 8 9
 7 9
 6 9
 5 9
 4 9
 3 9
 2 9
 1 9
 0 9
===