b21 := (1,2,5,11,23,31,15,7,3)(4,8,17,35,60,51,29,19,9)(6,13,27,50,82,52,30,28,
     14)(10,20,40,68,108,112,70,41,21)(12,25,48,80,125,126,81,49,26)(16,32,55,
     88,127,83,91,56,33)(18,36,61,98,145,148,100,62,37)(22,42,72,116,169,171,
     117,73,43)(24,46,78,123,178,179,124,79,47)(34,57,92,137,159,190,138,93,
     58)(38,63,101,149,205,211,152,102,64)(39,65,103,153,212,215,154,104,66)
     (44,74,119,174,233,235,175,120,75)(45,76,121,176,236,237,177,122,77)(53,
     84,128,180,204,242,184,130,85)(54,86,131,185,206,243,186,132,87)(59,94,
     139,168,227,251,191,140,95)(67,105,155,216,280,282,217,156,106)(69,109,
     160,220,287,289,221,161,110)(71,113,164,224,295,297,225,165,114)(89,133,
     99,147,201,264,208,151,134)(90,135,97,143,194,256,207,150,136)(96,141,
     173,232,308,316,252,192,142)(107,157,218,284,359,315,241,219,158)(111,
     162,222,290,368,371,293,223,163)(115,166,226,299,379,314,240,183,167)
     (118,172,231,254,193,253,239,182,129)(144,195,258,281,291,248,189,247,
     196)(146,199,263,279,292,246,188,245,200)(170,228,303,385,349,311,234,
     304,229)(181,238,313,312,392,393,317,244,187)(197,259,285,361,401,322,
     400,330,260)(198,261,283,357,399,321,398,331,262)(202,250,320,397,336,
     267,335,333,265)(203,249,319,396,338,268,337,334,266)(209,269,339,309,
     389,430,415,341,270)(210,271,342,307,388,431,416,343,272)(213,275,348,
     288,365,372,294,350,276)(214,277,351,286,362,375,296,352,278)(230,305,
     386,444,461,456,445,387,306)(255,323,402,332,329,410,448,403,324)(257,
     326,406,340,413,453,436,407,327)(273,344,417,366,302,384,443,419,345)
     (274,346,420,367,301,383,442,421,347)(298,376,425,355,424,437,373,364,
     377)(300,381,427,356,426,438,374,363,382)(310,390,446,457,439,395,318,
     394,391)(325,404,449,440,455,418,412,450,405)(328,408,451,462,454,414,
     452,411,409)(353,422,358,428,378,435,459,433,370)(354,423,360,429,380,
     434,458,432,369)(441,460,447);