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