special_tokens_map.json

{
  "additional_special_tokens": [
    "[PAD_left_1]",
    "[PAD_left_2]",
    "[PAD_left_3]",
    "[PAD_left_4]",
    "[PAD_left_5]",
    "[PAD_left_6]",
    "[PAD_left_7]",
    "[PAD_left_8]",
    "[PAD_left_9]",
    "[PAD_left_10]"
  ],
  "cls_token": "[CLS]",
  "mask_token": "[MASK]",
  "pad_token": "[PAD]",
  "sep_token": "[SEP]",
  "unk_token": "[UNK]"
}