Problems in Rocher Canon(528)

8c

8b+

8b

8a+

8a

7c+

7c

7b+

7b

7a+

7a

6c+

6c

6b+

6b

6a+

6a

5c

5b

5a

4c

4b

4a

3c

3b

3a

2c

2b

2a

1b