code: def eq_s_b(self, s):
      if self.cursor - self.limit_backward < len(s):
          return False
      if self.current[self.cursor - len(s) : self.cursor] != s:
          return False
      self.cursor -= len(s)
      return True
  
label_desc: Use image node_id 14 for calling the BaseStemmer obj's underlying member method code with example usage: obj.eq_s_b(s) and returns: True, False, False