b11 := (2,4)(3,6)(5,9)(7,12)(8,14)(10,17)(11,19)(13,21)(15,24)(16,26)(18,27)
     (20,29)(22,31)(28,37)(30,38)(32,41)(33,42)(34,43)(35,44)(36,45)(39,48)
     (40,50)(46,61)(47,62)(51,63)(52,65)(53,66)(54,68)(55,69)(56,71)(57,72)
     (58,74)(59,75)(60,76)(64,82)(67,87)(70,92)(73,97)(77,103)(78,105)(79,106)
     (80,108)(81,109)(83,112)(84,114)(85,115)(86,117)(88,120)(91,123)(93,124)
     (94,126)(95,127)(96,129)(98,130)(99,131)(100,133)(101,134)(102,136)(104,
     111)(107,118)(110,132)(113,148)(116,152)(119,135)(121,157)(122,158)(125,
     163)(128,167)(137,179)(138,177)(139,181)(140,153)(141,183)(142,149)(143,
     185)(144,186)(145,180)(146,187)(147,188)(150,189)(151,191)(154,160)(155,
     161)(156,196)(159,198)(162,175)(164,201)(165,203)(166,173)(168,204)(169,
     206)(170,207)(171,182)(172,193)(174,205)(176,209)(178,210)(184,197)(190,
     217)(192,208)(194,212)(195,199)(200,222)(202,211)(213,224)(214,225)(215,
     226)(216,227)(218,229)(220,230)(221,231)(233,234);