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