degree:20
 order:56
[ 20, 15, 20 ][ 4, 8, 6, 3 ]

minimal polynomial:[ x-20, x-6, x, x+4 ][ x-15, x-3, x+1, x+6 ]
[ x-20, x-4, x+1, x+4 ]

 SITA:
[ [ [ 1, 0, 0, 0 ], [ 0, 1, 0, 0 ], [ 0, 0, 1, 0 ], [ 0, 0, 0, 1 ] ], 
  [ [ 0, 20, 0, 0 ], [ 1, 8, 3, 8 ], [ 0, 4, 8, 8 ], [ 0, 8, 6, 6 ] ], 
  [ [ 0, 0, 15, 0 ], [ 0, 3, 6, 6 ], [ 1, 8, 2, 4 ], [ 0, 6, 3, 6 ] ], 
  [ [ 0, 0, 0, 20 ], [ 0, 8, 6, 6 ], [ 0, 8, 4, 8 ], [ 1, 6, 6, 7 ] ] ]