creo yo que asi va:
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5----7--10--7--5--3--2--(12)--------------
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5-----------------------------------------
6----3-3-3-3-3-3-3----5-5-5-5-5-5-5-------
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5-----------------------------------------
6----7--10--7--5--3--2---7-10-7-5-3-5-3-2-
y se repite