Ú°½‘O”¼3F-36.3(¸×½•½‹Ï37.8)
Ú°½Œã”¼3F-35.6(¸×½•½‹Ï35.0)
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2º:15=14,17(6,8)(10,18)(3,4,13)(2,5,11)1(12,16,9) 7
3º:15=14(8,17)18(6,10)(3,13)4(2,11)(5,1)(12,16,9) 7
4º:15=14,17,8,18(6,10)(3,4)13,2,11(5,1)(12,16)9 7
1’…”n / 2’…”n / 3’…”n