0

6
0 8
4 10
7 9
7 11
8 9
10 11

0

6
0 8
    1
    0 4
4 10
    1
    0 4
7 9
    1
    0 4
7 11
    1
    0 4
8 9
    1
    0 4
10 11
    1
    0 4
