b11 := (1,2)(3,5)(4,7)(6,10)(8,13)(9,15)(11,18)(12,20)(14,23)(16,21)(17,22)(19,
     29)(24,35)(25,37)(26,39)(27,41)(28,43)(30,46)(31,48)(32,50)(33,52)(34,54)
     (36,57)(38,60)(40,62)(42,65)(44,68)(45,70)(47,73)(49,75)(51,77)(53,78)
     (55,69)(56,80)(58,82)(59,74)(61,83)(63,84)(64,86)(66,89)(67,91)(71,87)
     (72,94)(76,92)(79,98)(81,93)(85,100)(88,103)(90,106)(95,109)(96,105)(97,
     112)(99,114)(101,108)(102,110)(104,117)(107,115)(111,120)(113,122)(116,
     121)(118,123)(119,124)(125,126);