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1º:9,10(4,12)(7,13)1,5(2,8)(14,15)-11-(3,6)
2º:9(10,12)4(7,13)(5,1)2-(14,8,15)-(11,6)=3
3º:(*9,10,12)(13,1)(4,7,15)2(5,8,6)=(14,11)=3
4º:9(10,12)13(7,1)2,4(15,6)5-8-14,11=3
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