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