new_contents: # Licensed to the Apache Software Foundation (ASF) under one or more
  # contributor license agreements.  See the NOTICE file distributed with
  # this work for additional information regarding copyright ownership.
  # The ASF licenses this file to You under the Apache License, Version 2.0
  # (the "License"); you may not use this file except in compliance with
  # the License.  You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from base import Command
  
  class Default(Command):
      """
      Handles input string that no other command can process
      """
  
      def execute(self, verb, arguments):
          """
          Handles input string that no other command can process
          """
          self.shell.say(
              "Sorry, I do not know how to handle '{}'".format(verb))
          return True
  
      @property
      def keyword(self):
          """
          Retrieves the verb or token for this command
          """
          return '*'
  
      @property
      def information_message(self):
          """
          Retrieves basic information for this command
          """
          return 'Handles unmatched input string.'
  
      @property
      def usage_message(self):
          """
          Retrieves usage information for this command
          """
          return None
  
      @property
      def is_hidden(self):
          """
          Ensures that this command appears in help
          """
          return True
  
subject: add a default command to catch unmatched verbs