b11 := (1,2)(3,5)(4,7)(6,10)(8,12)(9,13)(14,19)(15,20)(16,22)(17,23)(18,25)(24,
     31)(26,33)(27,34)(28,36)(29,38)(30,39)(35,45)(37,46)(41,48)(42,50)(43,51)
     (44,53)(47,57)(49,59)(52,62)(54,64)(55,65)(56,67)(58,70)(60,73)(61,74)
     (63,77)(66,80)(68,82)(69,75)(71,84)(72,85)(76,88)(78,90)(79,91)(81,94)
     (83,97)(86,100)(87,101)(89,102)(92,104)(93,105)(95,103)(96,106)(99,107)
     (108,114)(109,115)(110,112)(113,117)(118,119);