b := (  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
 19)( 20, 38, 55, 71, 86,100,113,125,136,146,155,163,170,176,181,185,188,190,
  37)( 21, 39, 56, 72, 87,101,114,126,137,147,156,164,171,177,182,186,189, 36,
 54)( 22, 40, 57, 73, 88,102,115,127,138,148,157,165,172,178,183,187, 35, 53,
  70)( 23, 41, 58, 74, 89,103,116,128,139,149,158,166,173,179,184, 34, 52, 69,
 85)( 24, 42, 59, 75, 90,104,117,129,140,150,159,167,174,180, 33, 51, 68, 84,
  99)( 25, 43, 60, 76, 91,105,118,130,141,151,160,168,175, 32, 50, 67, 83, 98,
 112)( 26, 44, 61, 77, 92,106,119,131,142,152,161,169, 31, 49, 66, 82, 97,111,
 124)( 27, 45, 62, 78, 93,107,120,132,143,153,162, 30, 48, 65, 81, 96,110,123,
 135)( 28, 46, 63, 79, 94,108,121,133,144,154, 29, 47, 64, 80, 95,109,122,134,
 145);