text: """ from https://github.com/keithito/tacotron """
  
  '''
  Defines the set of symbols used in text input to the model.
  
  The default is a set of ASCII characters that works well for English or text that has been run through Unidecode. For other data, you can modify _characters. See TRAINING_DATA.md for details. '''
  from text import cmudict
  
  _pad        = '_'
  _punctuation = '!\'(),.:;? '
  _special = '-'
  _letters = 'АБВГДЕЁЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдеёжзийклмнопрстуфхцчшщъыьэюя'
  
  # Prepend "@" to ARPAbet symbols to ensure uniqueness (some are the same as uppercase letters):
  _arpabet = ['@' + s for s in cmudict.valid_symbols]
  
  # Export all symbols:
  symbols = [_pad] + list(_special) + list(_punctuation) + list(_letters) + _arpabet
  