{
  "<pad>": 0,
  "H": 1,
  "C": 2,
  "N": 3,
  "O": 4,
  "F": 5,
  "S": 6,
  "Cl": 7,
  "P": 8,
  "Br": 9,
  "B": 10,
  "I": 11,
  "Si": 12,
  "Se": 13,
  "<unk>": 14,
  "<mask>": 15,
  "<global>": 16
}