--19(db)--19-20-19-17h19p17-15h17p15-14-15-17-14-15-14-15b-14------12-14-|
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15p14p12----------------12------------------------------------------------|
---------15b----12-13-16--16-12h13p12-13-12-12--12-13-13-15-13----17b-17--|b
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------------17-16-17b--17-16-17----12_15-15-15-15_14-14-14-14_17-17-17_18-|
17-15-17------------------------------------------------------------------|
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18-18-18_17-17-17-17-20-20-20-20_18-18-18-18-18-18-18-| ?????????
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15-15-15_14-14-14-14-17-17-17-17-15-15-15-15-14-14-14-|
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