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