z1 := (2,4)(3,5)(6,10)(7,11)(8,12)(9,13)(14,22)(15,23)(16,24)(17,25)(18,26)
     (19,27)(20,28)(29,43)(30,44)(31,45)(32,46)(33,47)(34,48)(35,49)(36,50)
     (37,51)(38,52)(39,53)(40,54)(41,55)(42,56)(57,85)(58,86)(59,87)(60,88)
     (61,89)(63,90)(64,91)(65,92)(66,93)(67,94)(68,95)(69,96)(70,97)(71,98)
     (72,99)(73,100)(74,101)(75,102)(76,103)(77,104)(78,105)(79,106)(80,107)
     (81,108)(82,109)(83,110)(84,111)(112,160)(113,161)(114,162)(115,163)(116,
     164)(117,145)(118,165)(119,166)(120,167)(121,150)(122,168)(123,169)(124,
     170)(125,171)(126,172)(127,173)(128,174)(129,175)(130,176)(131,177)(132,
     178)(133,179)(135,180)(136,181)(137,182)(138,183)(139,184)(140,185)(142,
     186)(143,187)(144,188)(146,189)(147,190)(148,191)(149,192)(152,193)(153,
     194)(154,195)(155,196)(156,197)(157,198)(158,199)(159,200)(201,262)(202,
     268)(203,269)(204,234)(205,270)(206,271)(207,272)(209,273)(210,274)(211,
     275)(212,276)(213,277)(214,278)(215,279)(216,280)(217,281)(218,282)(220,
     283)(221,284)(222,285)(223,286)(224,287)(225,288)(226,289)(227,267)(228,
     290)(229,291)(230,292)(231,293)(232,294)(233,295)(235,244)(236,296)(237,
     297)(238,298)(239,299)(240,300)(241,301)(242,302)(243,303)(245,304)(246,
     305)(247,306)(248,307)(249,260)(250,308)(251,265)(252,309)(253,310)(254,
     311)(255,312)(256,313)(257,314)(258,315)(259,316)(261,317)(263,318)(266,
     319)(320,391)(321,392)(322,393)(323,394)(324,395)(325,396)(326,397)(327,
     398)(328,399)(329,400)(330,387)(331,351)(332,372)(333,401)(334,402)(335,
     403)(336,404)(337,405)(338,348)(339,343)(340,359)(341,406)(342,407)(344,
     408)(345,409)(346,410)(347,411)(349,412)(350,413)(352,414)(353,415)(354,
     390)(355,416)(356,417)(357,418)(358,419)(360,362)(361,420)(363,421)(364,
     422)(365,423)(366,424)(367,425)(368,426)(369,385)(370,427)(371,428)(373,
     429)(374,430)(375,431)(376,432)(377,433)(378,434)(380,435)(381,382)(383,
     436)(386,437)(389,438)(439,493)(440,460)(441,473)(442,450)(443,463)(444,
     479)(445,494)(446,481)(447,495)(448,496)(449,469)(451,488)(452,497)(453,
     459)(454,498)(456,499)(457,500)(458,470)(461,501)(464,478)(465,474)(466,
     502)(467,503)(468,504)(471,505)(472,482)(475,506)(476,507)(477,508)(483,
     509)(484,510)(485,511)(486,491)(487,512)(489,513)(490,514)(492,515)(516,
     525)(517,521)(518,528)(519,520)(522,526)(523,524);