b21 := (1,2,3)(4,6,7)(5,8,9)(10,13,14)(11,15,16)(12,17,18)(19,25,26)(20,27,28)
     (21,29,30)(22,31,32)(23,33,34)(24,35,36)(37,49,50)(38,51,52)(39,53,54)
     (40,55,56)(41,57,58)(42,59,46)(43,60,61)(44,62,63)(45,64,65)(47,66,67)
     (48,68,69)(70,91,92)(71,93,94)(72,95,96)(73,97,98)(74,99,100)(75,101,102)
     (76,103,104)(77,105,106)(78,107,108)(79,109,110)(80,111,112)(81,113,114)
     (82,115,116)(83,117,118)(84,119,120)(85,121,122)(86,123,124)(87,125,126)
     (88,127,128)(89,129,130)(90,131,132)(133,168,169)(134,170,171)(135,172,
     173)(136,174,175)(137,176,177)(138,178,179)(139,180,181)(140,182,183)
     (141,184,185)(142,186,187)(143,188,162)(144,189,190)(145,191,192)(146,
     193,194)(147,195,196)(148,197,198)(149,199,200)(150,201,202)(151,203,204)
     (152,205,206)(153,207,208)(154,209,210)(155,211,212)(156,213,214)(157,
     215,216)(158,217,218)(159,219,220)(160,221,222)(161,223,224)(163,225,226)
     (164,227,228)(165,229,230)(166,231,232)(167,233,234)(235,297,298)(236,
     299,300)(237,301,302)(238,303,304)(239,305,276)(240,306,307)(241,308,309)
     (242,310,311)(243,312,313)(244,314,315)(245,316,317)(246,318,319)(247,
     320,321)(248,322,250)(249,323,324)(251,325,270)(252,326,327)(253,328,329)
     (254,330,331)(255,332,333)(256,334,335)(257,336,337)(258,338,339)(259,
     340,341)(260,342,265)(261,343,344)(262,345,346)(263,347,348)(264,349,350)
     (266,351,352)(267,353,354)(268,355,356)(269,357,358)(271,359,360)(272,
     361,362)(273,363,364)(274,365,366)(275,367,368)(277,369,370)(278,371,372)
     (279,373,374)(280,375,376)(281,377,378)(282,379,380)(283,381,382)(284,
     383,384)(285,385,386)(286,387,388)(287,389,390)(288,391,392)(289,393,394)
     (290,395,396)(291,397,398)(292,399,400)(293,401,402)(294,403,404)(295,
     405,406)(296,407,408)(409,506,461)(410,507,455)(411,508,509)(412,510,511)
     (413,512,442)(414,513,514)(415,515,516)(416,517,518)(417,519,520)(418,
     521,522)(419,523,431)(420,524,525)(421,526,527)(422,528,529)(423,463,436)
     (424,530,531)(425,532,533)(426,534,535)(427,536,537)(428,538,479)(429,
     539,540)(430,541,542)(432,543,544)(433,545,546)(434,547,548)(435,549,550)
     (437,551,552)(438,553,554)(439,555,556)(440,557,444)(441,558,559)(443,
     560,561)(445,562,563)(446,564,565)(447,566,567)(448,482,568)(449,569,473)
     (450,570,571)(451,572,573)(452,574,505)(453,575,576)(454,577,464)(456,
     578,579)(457,580,467)(458,581,582)(459,583,584)(460,585,586)(462,587,588)
     (465,589,590)(466,591,592)(468,593,594)(469,595,596)(470,597,598)(471,
     599,600)(472,496,601)(474,602,603)(475,604,605)(476,606,607)(477,608,609)
     (478,610,611)(480,612,501)(481,613,614)(483,615,616)(484,617,618)(485,
     619,493)(486,620,621)(487,622,623)(488,624,625)(489,626,627)(490,628,629)
     (491,630,631)(492,632,633)(494,634,495)(497,635,636)(498,637,638)(499,
     639,640)(500,641,642)(502,643,644)(503,645,646)(504,647,648)(649,755,715)
     (650,698,756)(651,685,757)(652,758,759)(653,760,761)(654,713,762)(655,
     763,666)(656,764,765)(657,766,767)(658,768,769)(659,770,771)(660,772,773)
     (661,774,775)(662,776,697)(663,777,778)(664,779,780)(665,781,782)(667,
     783,784)(668,785,786)(669,732,671)(670,787,788)(672,789,790)(673,791,718)
     (674,792,686)(675,793,794)(676,795,796)(677,797,798)(678,799,800)(679,
     801,802)(680,803,804)(681,805,806)(682,807,808)(683,809,810)(684,811,812)
     (687,813,710)(688,814,815)(689,816,817)(690,818,819)(691,820,821)(692,
     822,823)(693,824,825)(694,826,827)(695,828,829)(696,830,831)(699,729,832)
     (700,833,834)(701,835,836)(702,837,838)(703,839,745)(704,840,743)(705,
     841,842)(706,843,844)(707,845,846)(708,847,848)(709,849,850)(711,851,852)
     (712,853,854)(714,855,856)(716,857,858)(717,859,860)(719,861,862)(720,
     863,864)(721,865,866)(722,867,868)(723,869,870)(724,871,872)(725,873,874)
     (726,875,876)(727,877,878)(728,879,880)(730,881,882)(731,883,884)(733,
     885,886)(734,887,888)(735,889,739)(736,890,891)(737,892,752)(738,893,894)
     (740,895,896)(741,897,898)(742,899,900)(744,901,902)(746,903,904)(747,
     905,906)(748,907,908)(749,909,910)(750,911,912)(751,913,914)(753,915,916)
     (754,917,918)(919,930,1010)(920,1011,1004)(921,1012,927)(922,995,1013)
     (923,1014,1015)(924,1016,967)(925,1017,1018)(926,960,1019)(928,1020,955)
     (929,1021,1006)(931,1022,1023)(932,998,1024)(933,1025,944)(934,1026,1027)
     (935,1028,1029)(936,1030,1031)(937,1032,1033)(938,1034,1035)(939,948,969)
     (940,983,947)(941,1036,1037)(942,1038,1039)(943,1040,1041)(945,1042,1043)
     (946,1044,1045)(949,992,959)(950,1046,1047)(951,974,958)(952,1005,1048)
     (953,1049,1050)(954,1051,1052)(956,1053,988)(957,977,993)(961,1054,1055)
     (962,1056,1057)(963,1058,987)(964,1059,1060)(965,1008,973)(966,1061,971)
     (968,986,1062)(970,1063,1003)(972,1064,1065)(975,1066,1067)(976,1068,
     1069)(978,1070,1071)(979,1072,1073)(980,1074,1075)(981,1076,1077)(982,
     1078,1079)(984,1080,1081)(985,1082,1083)(989,1084,996)(990,1085,1086)
     (991,1087,1088)(994,1089,1000)(997,1009,1090)(999,1091,1092)(1001,1093,
     1094)(1002,1095,1096)(1007,1097,1098)(1099,1136,1137)(1100,1119,1138)
     (1101,1139,1140)(1102,1141,1142)(1103,1143,1144)(1104,1122,1145)(1105,
     1146,1147)(1106,1148,1126)(1107,1149,1150)(1108,1151,1118)(1109,1152,
     1153)(1110,1154,1111)(1112,1155,1156)(1113,1157,1125)(1114,1158,1159)
     (1115,1160,1161)(1116,1162,1132)(1117,1163,1164)(1120,1165,1166)(1121,
     1123,1135)(1124,1167,1168)(1127,1169,1133)(1128,1170,1130)(1129,1171,
     1134)(1131,1172,1173)(1174,1176,1175);