a := (  1, 17,  2)(  3, 18, 32)(  4, 19, 33)(  5, 20, 34)(  6, 21, 35)
(  7, 22, 36)(  8, 23, 37)(  9, 24, 38)( 10, 25, 39)( 11, 26, 40)
( 12, 27, 41)( 13, 28, 42)( 14, 29, 43)( 15, 30, 44)( 16, 31, 45);