b11 := (2,4)(3,5)(6,10)(7,11)(8,12)(9,13)(14,22)(15,23)(16,24)(17,25)(18,26)
     (19,27)(20,28)(21,29)(30,43)(31,44)(32,45)(33,46)(34,47)(35,48)(36,49)
     (37,50)(38,51)(39,52)(40,53)(41,54)(42,55)(56,81)(57,82)(58,83)(59,84)
     (60,61)(62,85)(63,86)(65,74)(66,87)(67,88)(68,89)(71,90)(72,91)(73,92)
     (76,93)(77,94)(78,95)(79,96)(80,97)(98,127)(99,128)(100,129)(101,106)
     (102,130)(103,108)(105,131)(107,132)(109,133)(110,115)(111,134)(112,135)
     (113,136)(114,137)(116,138)(117,122)(118,139)(119,124)(120,140)(123,141)
     (125,142)(126,143)(144,151)(145,155)(146,148)(147,159)(149,157)(150,160)
     (152,163)(153,166)(154,161)(156,165)(158,167)(162,164)(168,169);