|---------7----------7-------5---------5----------3---------3----------2---------2-----12---]
|-----5---------5---------3---------3---------1---------1----------1---------1--------------]
|--5---------5---------4---------4---------2---------2----------2---------2---------9-------]
|-------5---------5---------4---------4---------2----------2---------1---------1------------]