Tom: C
------5-5----5----------5--------
---7-------------8--7------------
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5---7------7---10---9---7--------
-------8-------------------10----
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---------------------------------
----7-----7---10--9--7--5--7--5--
10-----8------------------------7
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---------------------------------
---------------------------------
----5-5---5-7-7--9-10------------
-7-------------------------------
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