z1 := (1,2,5,3)(4,7,13,8)(6,10,15,11)(12,17,23,18)(14,19)(16,21)(20,26,33,27)
     (22,29,38,30)(24,31,25,32)(28,35,43,36)(34,41)(37,45,56,46)(39,48,44,49)
     (40,50,62,51)(42,53,67,54)(47,58,74,59)(52,64,81,65)(55,61,76,69)(57,71,
     60,72)(63,78,82,79)(66,83,104,84)(68,86)(70,88,111,89)(73,92,117,93)(75,
     94,119,95)(77,97,109,87)(80,100,126,101)(85,106,131,107)(90,113,105,96)
     (91,114,141,115)(98,122,129,103)(99,123,148,124)(102,121,130,128)(108,
     132,153,133)(110,135,125,136)(112,138,142,139)(116,143)(118,144,149,145)
     (120,146,162,147)(134,155,137,156)(150,164,168,157)(151,152,154,165)(158,
     167,174,169)(159,170,161,171)(160,163,166,172)(173,175);