b := (  1, 71, 60)(  2, 29, 18)(  3, 45, 41)(  4, 73,104)(  5,134, 36)
(  6, 94, 72)(  7, 40, 25)(  8,121, 80)(  9,106, 81)( 10,125,137)( 11, 98, 99)
( 12, 26, 46)( 13, 61,105)( 14, 51, 34)( 15, 23, 62)( 16, 85,123)( 17,133, 83)
( 19,138,110)( 20, 42, 95)( 21,120,114)( 22,111, 87)( 24,108, 50)( 27, 66, 74)
( 28, 76,122)( 30, 56,127)( 32, 88,109)( 33, 59,100)( 35, 37, 97)( 38, 75, 55)
( 39,119, 65)( 43, 63, 77)( 44, 86, 48)( 47, 69,132)( 49, 82, 64)( 52, 54,130)
( 53, 93, 84)( 57,118,139)( 67,140,116)( 68,113,107)( 70,117, 89)( 78,128,129)
( 79, 90,102)( 91,101,135)( 92,126,136)( 96,124,112)(103,131,115);