-------------------------------------|
-------------------------------------|
------5----4-------5---4-------------|
-7-------------5---------------------|
-------------------------------------|
-5-------------3---------------------|

-------------------------------------|
-------------------------------------|
---5----4--------5----4--------------|
-3------------2----------------------|
-------------------------------------|
-1------------0----------------------|


-------------------------------------|
-------------------------------------|
------5----4-------5---4-------------|
-7-------------5---------------------|
-------------------------------------|
-5-------------3---------------------|

-------------------------------------|
-------------------------------------|
---5----4--------5----4-----3--------|
-3------------2--------------2-------|
------------------------------0------|
-1------------0----------------0-----|