A

B1

B2

B3

B1

C1

C3

C4

B1

1

3

5

C1

1

2

3

B2

1/3

1

3

C3

1/2

1

2

B3

1/5

1/3

1

C4

1/3

1/2

1

B2

C2

C4

C5

C6

B3

C1

C2

C4

C6

C2

1

3

2

5

C1

1

5

3

4

C4

1/3

1

1/3

2

C2

1/5

1

3

2

C5

1/2

3

1

3

C4

1/3

1/3

1

2

C6

1/5

1/2

1/3

1

C6

1/4

1/2

1/2

1