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3|----------7-10-10-10-7-10-7------------
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) 5|--8-------------------------------------
4|----777-10---------10---10-7-8----------
3|-----------8-8-8-8----8-----------------
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) 5|----------------------------------------
4|--8---8-8-8---8-8-8---8--8-7------------
3|----7-------7-------7--7----------------
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