p1 := (2,3)(4,6)(5,8)(7,11)(9,14)(10,16)(12,19)(13,21)(15,23)(17,26)(18,28)
     (20,31)(22,34)(24,37)(25,39)(27,42)(29,45)(30,47)(32,49)(33,51)(35,54)
     (36,56)(38,59)(40,62)(41,64)(43,67)(44,69)(46,72)(48,75)(50,78)(52,81)
     (53,83)(55,85)(57,88)(58,90)(60,93)(61,95)(63,91)(65,99)(66,101)(68,104)
     (70,97)(71,108)(73,111)(74,113)(76,84)(77,116)(79,80)(82,121)(86,126)(87,
     128)(89,131)(92,135)(94,138)(96,107)(98,143)(100,146)(102,149)(103,151)
     (105,154)(106,156)(109,157)(110,159)(112,161)(114,164)(115,165)(117,144)
     (118,168)(119,170)(120,172)(122,174)(123,176)(124,178)(125,180)(127,183)
     (129,186)(130,188)(132,191)(133,193)(134,195)(136,198)(137,199)(139,140)
     (141,175)(142,204)(145,207)(147,210)(148,212)(150,214)(152,216)(153,218)
     (155,162)(158,223)(160,202)(163,226)(166,229)(167,231)(169,185)(171,235)
     (173,201)(177,240)(179,242)(181,245)(182,247)(184,250)(187,253)(189,249)
     (190,256)(192,259)(194,262)(196,265)(197,267)(200,271)(203,274)(205,275)
     (206,277)(208,280)(209,281)(211,244)(215,286)(217,289)(219,292)(220,294)
     (221,222)(224,269)(225,299)(227,302)(228,300)(230,305)(232,308)(233,310)
     (234,311)(236,285)(237,314)(238,239)(241,317)(243,261)(246,321)(248,323)
     (251,252)(254,327)(255,301)(257,329)(258,331)(260,312)(263,316)(264,273)
     (266,335)(268,337)(270,339)(272,341)(276,344)(278,347)(279,349)(282,338)
     (283,353)(284,355)(287,357)(288,358)(290,359)(291,361)(293,363)(295,366)
     (296,367)(297,369)(298,370)(303,372)(304,368)(306,373)(307,375)(309,376)
     (313,378)(315,381)(318,383)(319,385)(320,387)(322,377)(324,389)(325,390)
     (326,343)(328,392)(330,395)(332,398)(333,399)(334,400)(336,402)(342,391)
     (345,346)(348,410)(350,413)(351,414)(352,384)(354,417)(356,419)(360,424)
     (362,427)(364,386)(365,431)(374,418)(379,426)(380,433)(382,439)(388,432)
     (393,443)(394,444)(396,446)(401,415)(403,450)(404,437)(405,422)(407,408)
     (409,451)(411,453)(412,455)(416,421)(420,461)(423,464)(425,466)(428,452)
     (429,463)(430,456)(434,472)(435,474)(436,473)(438,476)(440,478)(441,448)
     (442,460)(445,482)(447,465)(449,487)(457,490)(458,492)(459,493)(462,471)
     (467,497)(468,498)(469,494)(470,499)(475,501)(477,502)(479,504)(480,484)
     (483,505)(485,491)(486,508)(488,510)(489,507)(495,512)(496,511)(500,509)
     (503,506);