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