<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def main():
 """Start the bot."""

    # Bale Bot Authorization Token
    updater = Updater("TOKEN")

    # Get the dispatcher to register handlers
    dp = updater.dispatcher

    # on different commands - answer in Bale
    dp.add_handler(CommandHandler("start", start))
    dp.add_handler(CommandHandler("help", help))

    # on noncommand i.e message - echo the message on Bale
    dp.add_handler(MessageHandler(DefaultFilter(), echo))

    # log all errors
    dp.add_error_handler(error)

    # Start the Bot
    updater.run()