B4

C20

C21

C22

C23

C24

C25

C26

C20

1

1

1/2

1/2

1

1

1

C21

1

1

1

2

2

2

1

C22

2

1

1

1

2

2

2

C23

2

1/2

1

1

2

3

3

C24

1

1/2

1/2

1/2

1

1

1

C25

1

1/2

1/2

1/3

1

1

1

C26

1

1

1/2

1/3

1

1

1