code: def _check_elementary_axis_name(name: str) -> bool:
      
      if len(name) == 0:
          return False
      if not 'a' <= name[0] <= 'z':
          return False
      for letter in name:
          if (not letter.isdigit()) and not ('a' <= letter <= 'z'):
              return False
      return True
docs: Valid elementary axes contain only lower latin letters and digits and start with a letter.