code: def tonos_oxia_converter(text, reverse=False):
      
      for char_tonos, char_oxia in TONOS_OXIA.items():
          if not reverse:        
              text = text.replace(char_tonos, char_oxia)
          else:
              text = text.replace(char_oxia, char_tonos)
      return text
docs: For the Ancient Greek language. Converts characters accented with the
        tonos (meant for Modern Greek) into the oxia equivalent. Without this
        normalization, string comparisons will fail.