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1º:15,11,6(1,10,12)(3,5,8)(2,13)7(4,9,14)16
2º:15,11,6,10(1,12)(3,8)5(2,13)7,9(4,14)16
3º:(*15,11)(10,12)(6,1,3,9)(5,8)2,7(14,16,13)-4
4º:(15,*11,10)12(6,1,3,5,9)(2,7,8)(14,16,13)=4
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