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--------19-19-18-19-18-16---------------------19-19-
|-------16-16-19-19-------------------19-17-16----|-------16-16-19-19-------
|-17-17----------------------------------------19-|-17-17-------------------
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-17------17--|-19-19-17-17-20-20-19-19--------------------------
---------------------------------------18-18-19-19--
-----19--------------------------------------------|-17-17-16-16
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-16-16----------------------------------------------------------
-------19-19-------------------17-17-|-16----16----------------------16-17--
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