||--------------------------------------------------------------|
||--------------------------------------------------------------|
||--------------------------------------------------------------|
||-----7----7-----7----7----8----7------------------------------|
||---0----0----------0----0-------------------------------------|
||-0----0-----0----0----0----0----------------------------------|

||--------------------------------------------------------------|
||--------------------------------------------------------------|
||--------------------------------10-9--------------------------|
||---------------------------10--------10-9-7-------------------|
||-0--0-0-0--5-3-2-3--8--8-8-8----------------8-7---------------|
||-0--0-0-0--5-3-2-3--8--8-8-8----------------------------------|
      . .    . . . . 
||--------------------------------------------------------------|
||--------------------------------------------------------------|
||--------------------------------------------------------------|
||--------------------------------------------------------------|
||-0-0-0-0---------0-0-0----------------------------------------|
||-0-0-0-0---------0-0-0----------------------------------------|
   . . . .         . . .
||--------------------------------------------------------------|
||--------------------------------------------------------------|
||--------------------------------------------------------------|
||--------------------------------------------------------------|
||-85858585858585857676767676767676-----------------------------|
||-------------------------------------------------------------|