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----------1-----3--|
-2-3-3-3-----3----3|


Courus
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-0-0-0-0-0-0-0-0-0--7-5-----------------|
------------------------7--5-5-5-5-5-5-5|
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---------------------3----------------------3
---------------------1----------------------1-3|-
0-0-0-0-0-0--0-0-0-----0-0-0-0-0-0--0--0--0---1|-