special_tokens_map.json

{
  "additional_special_tokens": [
    "[USR]",
    "[SYS]"
  ],
  "bos_token": "[CLS]",
  "cls_token": "[CLS]",
  "eos_token": "[EOS]",
  "mask_token": "[MASK]",
  "pad_token": "[PAD]",
  "sep_token": "[SEP]",
  "unk_token": "[UNK]"
}