LaGriT/test/level02/write_exo/reference/out_3d_hex_extract.faceset

         0          0          0          2          0
00002  1  1
idelem1, integer 
idface1, integer 
   1   1
   1   3
   1   6
   2   1
   2   3
   3   1
   3   3
   3   4
   4   1
   4   6
   5   1
   6   1
   6   4
   7   1
   7   5
   7   6
   8   1
   8   5
   9   1
   9   4
   9   5
  10   3
  10   6
  11   3
  12   3
  12   4
  13   6
  15   4
  16   5
  16   6
  17   5
  18   4
  18   5
  19   2
  19   3
  19   6
  20   2
  20   3
  21   2
  21   3
  21   4
  22   2
  22   6
  23   2
  24   2
  24   4
  25   2
  25   5
  25   6
  26   2
  26   5
  27   2
  27   4
  27   5