b21 := (1,3,2,6,11,23,19,9,5)(4,8,15,31,57,51,28,13,7)(10,20,39,69,126,136,74,
     42,21)(12,25,48,87,156,162,90,49,26)(14,29,53,95,173,110,60,33,17)(16,24,
     47,84,151,196,107,59,32)(18,34,30,55,99,183,115,63,35)(22,43,76,140,252,
     159,89,78,44)(27,50,38,67,121,213,118,64,36)(37,65,77,52,93,168,214,119,
     66)(40,71,131,238,203,112,62,111,72)(41,61,54,97,178,305,242,133,73)(45,
     79,142,256,291,396,262,145,80)(46,81,146,264,307,418,269,149,82)(56,101,
     186,318,287,166,92,165,102)(58,105,191,325,491,336,202,193,106)(68,123,
     222,360,530,395,366,225,124)(70,128,231,379,556,563,385,235,129)(75,137,
     158,88,157,198,108,197,138)(83,150,270,420,386,286,412,266,147)(85,152,
     211,116,210,148,254,141,153)(86,154,273,426,397,245,135,244,155)(91,163,
     233,130,236,387,326,284,164)(94,170,292,446,440,285,323,261,171)(96,175,
     300,459,634,639,462,303,176)(98,180,308,469,334,200,109,199,181)(100,104,
     190,260,216,120,215,314,184)(103,134,243,288,167,195,330,265,189)(113,
     204,302,461,636,557,380,339,205)(114,206,188,322,309,471,506,343,207)
     (117,143,192,316,185,315,479,347,212)(122,219,355,520,696,698,524,356,
     220)(125,226,368,542,722,562,406,253,227)(127,230,376,553,677,500,340,
     306,179)(132,174,299,456,631,762,573,393,239)(139,249,370,463,342,503,
     400,248,250)(144,258,247,399,358,221,357,411,259)(160,278,433,608,736,
     554,377,434,279)(161,280,263,321,187,320,488,436,281)(169,218,354,517,
     694,790,619,444,290)(172,295,451,601,780,597,424,272,296)(177,304,464,
     543,369,246,398,333,301)(182,310,473,574,394,241,384,276,311)(194,328,
     493,583,769,697,521,494,329)(201,335,401,577,765,632,457,437,282)(208,
     240,365,224,364,538,635,460,344)(209,345,350,294,450,626,685,508,346)
     (217,353,515,592,777,688,591,421,332)(223,362,535,713,805,669,495,537,
     363)(228,371,545,726,657,477,313,476,372)(229,373,548,575,764,649,732,
     551,374)(232,381,559,744,670,492,327,257,382)(234,383,560,745,675,498,
     338,413,267)(237,389,568,755,589,415,268,414,390)(251,403,580,768,819,
     659,480,417,404)(255,407,584,771,674,497,337,416,408)(271,422,593,550,
     724,544,435,596,423)(274,428,602,540,367,539,489,605,429)(275,430,452,
     297,425,598,781,606,431)(277,432,607,579,767,695,518,496,331)(283,438,
     348,419,590,716,629,600,427)(289,410,586,774,804,638,578,402,405)(293,
     448,625,653,689,510,349,509,449)(298,453,599,612,564,472,651,630,454)
     (312,474,654,815,704,648,470,647,475)(317,481,661,616,442,615,622,664,
     482)(319,485,644,466,643,810,826,667,486)(324,439,546,468,613,666,487,
     576,490)(341,501,514,352,513,693,832,680,502)(351,511,409,388,566,752,
     660,692,512)(359,527,701,795,624,447,623,665,528)(361,532,682,504,681,
     834,856,710,533)(375,552,733,869,825,751,723,729,549)(378,499,676,798,
     794,813,727,738,555)(391,569,757,885,787,610,650,484,570)(392,571,483,
     621,445,620,792,760,572)(441,614,788,886,812,646,467,645,529)(443,617,
     772,890,836,699,525,587,522)(455,611,603,784,753,567,735,797,628)(458,
     507,655,817,824,663,823,800,633)(465,642,706,849,747,561,478,658,526)
     (505,683,531,705,609,725,864,839,684)(516,673,594,778,759,884,756,841,
     687)(519,672,581,717,860,894,791,828,691)(523,671,786,746,880,932,898,
     803,637)(534,711,536,547,728,668,827,852,708)(541,719,783,892,808,878,
     861,718,720)(558,740,875,785,604,627,782,865,741)(565,749,652,678,640,
     679,829,882,750)(582,715,766,770,838,913,881,748,588)(585,773,891,843,
     700,775,761,618,690)(595,686,776,842,737,872,809,806,779)(641,714,830,
     763,888,934,938,900,807)(656,796,801,897,847,703,846,799,818)(662,822,
     909,925,911,896,802,883,754)(702,730,709,853,902,854,742,876,743)(707,
     850,820,906,941,940,904,910,851)(712,857,814,905,927,867,731,866,831)
     (721,862,926,931,921,935,889,848,863)(734,870,855,923,859,893,789,758,
     871)(739,873,903,899,833,816,837,811,874)(793,868,928,936,922,933,887,
     840,895)(821,907,835,912,858,901,939,942,908)(844,917,943,924,915,937,
     945,944,918)(845,919,879,930,916,877,929,914,920);