---10-12b13-12-10------------------------10-12b13-12-10-------------------|
--10-------------------10^13^10--------10-----------------13(b)15--10^13--|
-10-----------------------------------10----------------------------------|
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---10-12b13-12-10---------------------------10-12b13-12-10-----------------|
--10------------------13(b)15--13^15------10-----------------13b15---10^13-|
-10---------------------------------14---10--------------------------------|
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