B1

C1

C2

C6

C1

1

1/3

1/2

C2

3

1

1

C6

2

1

1

B2

C3

C4

C5

C3

1

2

3

C4

1/2

1

1

C5

1/3

1

1

B3

C7

C8

C7

1

3

C8

1/3

1