b11 := (2,4)(3,5)(6,10)(7,11)(8,12)(9,13)(15,22)(16,23)(17,24)(18,25)(19,26)
     (20,27)(21,28)(29,40)(30,41)(31,42)(32,43)(33,44)(34,45)(35,46)(36,47)
     (37,48)(39,49)(50,61)(52,62)(53,55)(56,63)(57,64)(59,60)(65,66);