8

4 6 8 10 12

4-6 6-8

6-8

10

6 10

6-8

6 10

6 10 12

6

6 10

6

6-8 8-10

6-8 6-8 short

6-8 8-10

6

8-10

4 8 12

4 6 8 12

6 10 12

10

6-8

8 10

6