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