6/3 7/5

7/6_{x x}6/7 (10/5)

6/3 5/7 4/6

6/1 6/3

3/6 6/3 3/6

_x6/7 6/3 (8/10)

_x6/7 6/2 (7/10)

1/6 3/6

3/6 5/7

7/6_{x x}6/7 (13/11)

6/3 6/4

6/0 7/6_x

4/6 3/6

6/1 6/2

6/3 3/6 (10/0)

6/4 3/6 (10/7)

3/6 6/3 (12/10)

1/6 6/3 6/3

6/3 6/2

4/6 2/6

6/1 6/4

6/2 6/4

6/3 4/6 6/2

4/6 1/6

3/6 4/6

6/4 3/6 6/2

_x6/7 6/4 6/1

3/6 4/6