b11 := (1,14)(2,51)(3,47)(4,53)(5,44)(6,19)(7,10)(8,16)(11,45)(12,28)(13,34)
     (17,27)(18,37)(20,29)(22,41)(23,32)(24,38)(26,35)(30,42)(31,55)(33,56)
     (36,52)(43,57)(48,54);