a11 := (2,3)(4,6)(5,8)(7,11)(9,13)(10,15)(12,18)(14,21)(16,23)(17,25)(19,28)
     (20,30)(22,33)(24,36)(26,38)(27,40)(29,43)(31,45)(32,47)(34,50)(39,55)
     (41,57)(42,59)(46,64)(48,66)(49,68)(53,72)(54,74)(56,76)(58,79)(60,81)
     (63,85)(65,87)(69,91)(70,93)(71,95)(73,98)(75,100)(77,103)(78,105)(80,
     107)(82,109)(83,110)(84,112)(86,114)(88,116)(89,118)(90,119)(92,121)(94,
     123)(96,126)(97,127)(99,130)(101,132)(102,133)(104,135)(106,137)(108,140)
     (111,143)(113,145)(115,148)(117,150)(120,153)(122,155)(124,158)(125,159)
     (128,162)(129,164)(131,167)(134,171)(136,174)(138,177)(139,178)(141,180)
     (142,182)(144,184)(147,188)(149,190)(151,193)(152,169)(154,196)(156,199)
     (157,201)(160,203)(161,205)(163,208)(165,210)(166,212)(168,172)(170,216)
     (173,220)(176,223)(179,226)(183,231)(185,234)(186,236)(189,238)(191,241)
     (192,242)(194,244)(195,246)(202,251)(204,254)(206,257)(207,259)(211,262)
     (213,264)(214,266)(217,268)(218,270)(219,272)(222,274)(224,277)(227,280)
     (228,255)(229,282)(230,283)(232,286)(233,288)(235,290)(237,292)(239,295)
     (240,296)(243,300)(247,304)(248,306)(249,307)(252,311)(253,313)(256,315)
     (258,318)(261,320)(263,323)(265,326)(267,328)(269,298)(271,331)(273,334)
     (275,336)(276,338)(278,341)(279,343)(281,345)(284,347)(287,350)(289,352)
     (291,355)(293,358)(294,360)(297,362)(299,364)(302,367)(303,369)(305,372)
     (308,375)(309,376)(310,377)(312,379)(317,384)(319,387)(321,390)(322,391)
     (324,393)(325,394)(327,397)(329,399)(330,401)(332,404)(333,363)(335,407)
     (337,408)(339,410)(340,412)(342,414)(344,415)(346,418)(348,421)(349,370)
     (351,424)(356,429)(357,431)(365,436)(366,438)(368,416)(371,442)(374,445)
     (378,450)(380,452)(381,453)(382,443)(383,454)(385,456)(386,457)(388,448)
     (389,459)(392,462)(398,468)(400,470)(402,471)(405,428)(406,474)(409,477)
     (411,479)(413,480)(417,485)(419,487)(420,489)(422,491)(423,492)(425,494)
     (426,496)(427,498)(432,502)(433,503)(434,504)(435,505)(439,509)(440,510)
     (444,513)(446,516)(447,463)(451,518)(458,526)(461,515)(464,531)(465,532)
     (466,521)(467,525)(469,536)(472,540)(473,542)(475,544)(476,481)(478,499)
     (482,514)(483,552)(484,553)(488,556)(490,548)(493,560)(495,561)(497,563)
     (500,566)(501,567)(506,569)(507,571)(508,572)(511,575)(512,577)(517,581)
     (519,583)(520,557)(523,527)(524,586)(528,590)(529,541)(530,592)(533,595)
     (535,596)(537,599)(538,600)(539,601)(543,554)(545,606)(547,607)(549,609)
     (550,610)(551,611)(555,613)(559,578)(564,618)(568,620)(570,622)(573,623)
     (576,626)(579,593)(582,629)(584,631)(587,634)(588,635)(589,636)(591,637)
     (594,639)(597,603)(598,643)(602,646)(604,648)(605,619)(608,650)(614,653)
     (615,644)(616,655)(621,657)(625,660)(627,662)(628,664)(630,665)(632,666)
     (633,651)(642,671)(649,674)(652,677)(658,669)(659,661)(667,683)(672,680)
     (673,678)(675,685)(679,687)(682,686)(689,692)(690,691);