z1 := (1,2)(3,5)(4,7)(6,11)(8,15)(9,17)(10,19)(12,23)(13,24)(14,26)(16,29)(18,
     27)(20,34)(21,36)(22,38)(25,42)(28,47)(30,51)(31,53)(32,55)(33,56)(35,60)
     (37,62)(39,65)(40,49)(41,68)(43,67)(44,71)(45,73)(46,75)(48,77)(50,78)
     (52,82)(54,86)(57,91)(58,93)(59,94)(61,97)(63,84)(64,102)(66,106)(69,111)
     (70,112)(72,115)(74,119)(76,122)(79,128)(80,118)(81,131)(83,132)(85,134)
     (87,116)(88,135)(89,137)(90,100)(92,139)(95,138)(96,144)(98,123)(99,147)
     (101,127)(103,104)(105,151)(107,153)(108,154)(109,124)(110,155)(113,156)
     (114,159)(117,160)(120,161)(121,164)(125,167)(126,169)(129,145)(130,171)
     (133,174)(136,148)(140,183)(141,179)(142,177)(143,187)(146,191)(149,192)
     (150,176)(152,194)(157,200)(158,195)(162,201)(163,205)(165,168)(166,206)
     (170,189)(172,209)(173,210)(175,213)(178,198)(180,215)(181,217)(182,218)
     (184,219)(185,220)(186,221)(188,223)(190,196)(193,226)(197,225)(199,227)
     (202,230)(203,216)(204,231)(207,214)(208,233)(211,229)(212,235)(222,228)
     (224,234)(232,237)(236,240)(238,239);