{
  "<cls>": 0,
  "<pad>": 1,
  "<eos>": 2,
  "<unk>": 3,
  "A": 4,
  "C": 5,
  "G": 6,
  "U": 7,
  "R": 8,
  "Y": 9,
  "K": 10,
  "M": 11,
  "S": 12,
  "W": 13,
  "B": 14,
  "D": 15,
  "H": 16,
  "V": 17,
  "N": 18,
  "-": 19,
  "<null_1>": 20,
  "<null_2>": 21,
  "<null_3>": 22,
  "<null_4>": 23,
  "<mask>": 24
}