A

B

C

C

B

B

B

B

A

C

B

B

C

B

A

A

B

C

A

B

A

B

A

B

C

C

C

A

B

A

B

B

C

A

B

C

A

A

B

B

C

C

C

B

B

B

B

A

C

C

A