b11 := (1,2,4)(3,6,5)(7,11,10)(12,17,16)(18,24,23)(25,31,42)(27,34,47)(28,36, 51)(29,38,55)(30,40,59)(33,45,67)(35,49,71)(37,53,77)(39,57,83)(41,61,89) (43,64,63)(46,69,99)(48,72,106)(50,75,74)(52,78,114)(54,81,80)(56,84,121) (58,87,86)(60,90,128)(62,93,92)(65,66,96)(68,100,137)(70,103,102)(73,108, 143)(76,111,138)(79,116,151)(82,118,107)(85,123,157)(88,125,115)(91,130, 163)(94,132,122)(97,98,129)(101,110,147)(104,141,175)(109,145,179)(117, 153,189)(124,159,197)(131,165,205)(135,170,164)(139,148,183)(140,174,214) (144,155,192)(149,185,172)(152,161,200)(158,167,208)(171,212,262)(176, 216,215)(177,218,265)(180,222,221)(182,225,275)(184,227,226)(186,230,229) (187,232,281)(190,236,235)(193,240,239)(195,228,276)(198,245,244)(201, 249,248)(203,217,263)(206,255,254)(209,224,258)(219,267,319)(223,272,271) (231,279,264)(233,283,332)(237,288,287)(241,293,292)(242,295,327)(246, 300,299)(250,305,304)(252,278,317)(256,269,310)(259,290,274)(266,320,376) (268,322,321)(273,324,277)(280,294,347)(282,333,389)(284,336,335)(289, 342,341)(296,350,349)(301,356,355)(306,362,361)(307,345,329)(311,338,323) (314,358,344)(318,346,330)(325,343,397)(328,382,378)(331,386,402)(334, 391,444)(337,395,394)(348,363,418)(351,406,405)(357,413,412)(364,416,400) (368,408,396)(371,425,415)(374,417,401)(379,432,449)(383,437,436)(387, 442,441)(390,445,483)(392,447,446)(398,414,460)(403,454,464)(407,458,457) (419,427,470)(420,465,462)(424,466,459)(429,434,463)(433,475,474)(438, 472,478)(450,485,489)(461,469,493);