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