A

B

B

B

B

A

B

D

C

B

A

C

A

D

A

B

B

A

A

B

A

D

B

D

B

C

A

C

D

C

C

D

C

C

B

D

B

A

C

B

C

D

D

A

C

B

D

A

B

D

B

B

A

B

A

A

B

C

B

B

A

B

D

A

A

A

C

B

D

B

C

D

C

B

B