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