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1º:(*10,2)-(6,7)13(1,8,14)(3,11)(4,15)16(12,17)(5,18)-9
2º:(*10,2)(6,7)(1,13)(8,14)11(3,4,15)12(17,16)-(5,18)-9
3º:10,2(6,7)13(1,8,14)11(3,4,15)-12,16(5,17)18-9
4º:10,2-(6,7,13)(1,8)(3,11,14)5(12,4)(17,16,15)-18,9
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