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