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