b21 := (1,2,5,6,12,23,18,9,3)(4,10,20,36,57,62,39,22,11)(7,13,25,42,49,29,45,
     26,14)(8,15,27,46,68,73,51,30,16)(17,31,43,65,91,105,75,52,32)(19,34,55,
     77,107,84,79,56,35)(21,37,59,83,113,108,78,60,38)(24,40,63,85,74,104,90,
     64,41)(28,47,69,97,119,122,100,70,48)(33,53,76,106,95,102,86,61,54)(44,
     66,92,116,99,120,115,89,67)(50,71,101,121,109,124,111,82,72)(58,80,110,
     125,123,103,87,112,81)(88,93,96,118,126,117,94,98,114);