degree:8
 order:21
[ 8, 4, 8 ][ 2, 4, 2, 0 ]

minimal polynomial:[ x-8, x-2, x^2+4*x+2 ][ x-4, x+2, x^2-2*x-1 ]
[ x-8, x+1, x^2-8 ]

 SITA:
[ [ [ 1, 0, 0, 0 ], [ 0, 1, 0, 0 ], [ 0, 0, 1, 0 ], [ 0, 0, 0, 1 ] ], 
  [ [ 0, 8, 0, 0 ], [ 1, 2, 1, 4 ], [ 0, 2, 2, 4 ], [ 0, 4, 2, 2 ] ], 
  [ [ 0, 0, 4, 0 ], [ 0, 1, 1, 2 ], [ 1, 2, 1, 0 ], [ 0, 2, 0, 2 ] ], 
  [ [ 0, 0, 0, 8 ], [ 0, 4, 2, 2 ], [ 0, 4, 0, 4 ], [ 1, 2, 2, 3 ] ] ]