z1 := (1,2,6,4)(3,9,15,10)(5,13,16,14)(7,17,11,18)(8,19,12,20)(21,37,23,38)
     (22,39,24,40)(25,41,27,42)(26,43,28,44)(29,45,31,46)(30,47,32,48)(33,49,
     35,50)(34,51,36,52)(53,85,55,86)(54,87,56,88)(57,89,59,90)(58,91,60,92)
     (61,93,63,94)(62,95,64,96)(65,97,67,98)(66,99,68,100)(69,101,71,102)(70,
     103,72,104)(73,105,75,106)(74,107,76,108)(77,109,79,110)(78,111,80,112)
     (81,113,83,114)(82,115,84,116)(117,180,119,178)(118,181,120,182)(121,183,
     123,184)(122,185,124,186)(125,187,127,188)(126,160,128,158)(129,189,131,
     190)(130,191,132,192)(133,193,135,194)(134,195,136,196)(137,171,139,169)
     (138,197,140,198)(141,199,143,200)(142,201,144,202)(145,203,147,204)(146,
     151,148,149)(150,205,152,206)(153,207,155,208)(154,209,156,210)(157,211,
     159,212)(161,213,163,214)(162,215,164,216)(165,217,167,218)(166,219,168,
     220)(170,221,172,222)(173,223,175,224)(174,225,176,226)(177,227,179,228)
     (229,301,231,302)(230,303,232,304)(233,305,234,306)(235,307,237,308)(236,
     309,238,310)(239,311,241,312)(240,313,242,314)(243,315,245,316)(244,317,
     246,318)(247,319,248,320)(249,321,251,322)(250,323,252,324)(253,325,255,
     326)(254,327,256,328)(257,329,259,330)(258,331,260,332)(261,333,263,334)
     (262,335,264,336)(265,337,267,338)(266,339,268,340)(269,341,270,342)(271,
     343,273,344)(272,345,274,346)(275,347,277,348)(276,349,278,350)(279,351,
     281,352)(280,353,282,354)(283,355,284,356)(285,357,287,358)(286,359,288,
     360)(289,361,291,362)(290,363,292,364)(293,365,295,366)(294,367,296,368)
     (297,369,299,370)(298,371,300,372)(373,469,374,470)(375,461,377,463)(376,
     471,378,472)(379,473,381,474)(380,475,382,476)(383,477,385,478)(384,466,
     386,468)(387,479,388,480)(389,481,391,482)(390,441,392,443)(393,438,395,
     440)(394,483,396,484)(397,485,399,486)(398,487,400,488)(401,489,402,490)
     (403,491,405,492)(404,455,406,457)(407,452,409,454)(408,493,410,494)(411,
     495,412,496)(413,423,415,425)(414,497,416,498)(417,499,419,500)(418,432,
     420,434)(421,501,422,502)(424,503,426,504)(427,505,429,506)(428,507,430,
     508)(431,509,433,510)(435,511,436,512)(437,513,439,514)(442,515,444,516)
     (445,517,447,518)(446,519,448,520)(449,521,450,522)(451,523,453,524)(456,
     525,458,526)(459,527,460,528)(462,529,464,530)(465,531,467,532)(533,584,
     535,582)(534,589,536,590)(537,591,538,592)(539,593,540,594)(541,577,542,
     578)(543,571,545,573)(544,595,546,596)(547,597,548,598)(549,569,550,570)
     (551,599,552,600)(553,601,555,602)(554,563,556,561)(557,603,559,604)(558,
     586,560,588)(562,605,564,606)(565,607,566,608)(567,609,568,610)(572,611,
     574,612)(575,613,576,614)(579,615,580,616)(581,617,583,618)(585,619,587,
     620)(621,637,622,638)(623,639,624,640)(625,641,626,642)(627,643,628,644)
     (629,645,630,646)(631,647,632,648)(633,649,634,650)(635,651,636,652)(653,
     661,654,662)(655,663,656,664)(657,665,658,666)(659,667,660,668)(669,672,
     670,671);