Indices (0-indexed) of the 100 images held out from training.
[  113   509   242   280   533   638   644   698   751   832 10989 16008
 13473  6659 20401 24841 26378  8103 11730  8363 16512  6736 27666 30287
  6685 30696 16591  8424 26689 21078 27971  7202  6615 36150  9681 13137
  1598  9726  4825  2864  1346 21784  4159 13270 19239  9844 16056  2822
 15792 19837  5198 19980 30042 36491 15648 20315  3604  8020  1108 18235
 16373 25717 32200 10547  6786 31384 33999 25763 20226  9447  4573  5938
  1837 25121 17611 32751 28158 29381 13090 32210 17027 30171 12001 16240
 22205 11808 20113 10682 33338 24015 15154 10449 11373  8736 26320  4095
 13855 23504  2004 33307]