0

6
0 9
4 11
8 10
8 12
9 10
11 12

0

6
0 9
    1
    0 4
4 11
    1
    0 4
8 10
    1
    0 4
8 12
    1
    0 4
9 10
    1
    0 4
11 12
    1
    0 4
