|----------------------------------------------------------|
|----------------------------------------------------------|
|--7-6-----------------------------------------------------|
|------(b9)7-(b9)--------7----------7--------------------------|
|------------(b9)--(b9)7---(b9)(9)-7----(b9)-7--(b9)---5-(b9)7---5-----|
|--------------------------------------------------------(b9)|


|----------------------------------------------------------|
|----------------------------------------------------------|
|----------------------------------------------------------|
|----------------------------------------------------------|
|----------------(b9)(9)---5-(b9)7---5-----------5-------------|
|-5-7----5-7-5-7--------------------(b9)-7-7-(b9)--(b9)5-7--7----|