-------------------------9p7---|
-7-5-5--5-5-5-5-4-4-5-5-----(b9)-|
-------------------------------|
-------------------------------|
-4------7----------------------|
----------------7---5----------|

-------------------------9p7---|
-7-5-5--5-5-5-5-------------(b9)-|
----------------6-6-4-4--------|
-------------------------------|
-4------7----------------------|
----------------7---5----------|
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