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