input: 
  def simple_chatbot() -> None:
      """
      Create a simple chatbot using Python and state diagrams.
      The bot transitions between different states based on user input, each state has a specific message and possible replies that lead to other states.
      The bot ends the conversation when it reaches a terminal state with no possible replies.
      >>> simple_chatbot()
      Hello! How can I help you?
      >> I need some advice
      Sure, what kind of advice do you need?
      >> Career advice
      It is always a good idea to research the field you are interested in and creating a plan to learn the skills that are required. Make sure to contact professionals in the field to understand their experience.
      Goodbye!
      =========================
      Conversation:
      Hello! How can I help you?
      I need some advice
      Sure, what kind of advice do you need?
      Career advice
      It is always a good idea to research the field you are interested in and creating a plan to learn the skills that are required. Make sure to contact professionals in the field to understand their experience.
      """
  
      # Create the states
      state0 = {
           'name': 'state0',
           'message': 'Hello! How can I help you?',
           'replies': {'I need some advice': 'state1', 'Can you answer my questions?': 'state2'}
      }
  
      state1 = {
           'name': 'state1',
           'message': 'Sure, what kind of advice do you need?',
           'replies': {'Career advice': 'state3','Health advice': 'state4'}
      }
  
      state2 = {
           'name': 'state2',
           'message': 'Yes, I'll do my best! What do you want to know?',
           'replies': {'Where can I find good tutorials': 'state5', 'Why is coding so hard': 'state6'}
      }
  
      state3 = {
           'name': 'state3',
           'message': 'It is always a good idea to research the field you are interested in and creating a plan to learn the skills that are required. Make sure to contact professionals in the field to understand their experience.',
           'replies': {}
      }
  
      state4 = {
           'name': 'state4',
           'message': 'Focus on eating healthy and staying active. Make sure to consult a medical professional if you have any concerns.',
           'replies': {}
      }
  
      state5 = {
           'name': 'state5',
           'message': 'You can find tutorials online or join coding communities to get help from experienced coders. StackOverflow and Cod Academy are great resources.',
           'replies': {}
      }
  
      state6 = {
           'name': 'state6',
           'message': 'Coding can be challenging, especially at first. Just remember that with practice, patience and problem solving skills you can overcome the obstacles.',
           'replies': {}
      }
  
      # Initialize the state
      current_state = state0
  
      # Keep a record of conversation
      conversation = []
  
      while True:
       # Print the current state message
       print(current_state['message'])
       conversation.append(current_state['message'])
  
       # Get the user input
       user_input = input('>> ')
       conversation.append(user_input)
  
       # Update the state
       if user_input in current_state['replies']:
        current_state = eval(current_state['replies'][user_input])
       else:
        print("I don't understand what you mean. Please try again.")
  
       # End the conversation when the state is terminal
       if not bool(current_state['replies']):
        print('Goodbye!')
        break
  
      print("=========================")
      print("Conversation:")
      for message in conversation:
       print(message)
  
output:     # Create the states
      state0 = {
           'name': 'state0',
           'message': 'Hello! How can I help you?',
           'replies': {'I need some advice': 'state1', 'Can you answer my questions?': 'state2'}
      }
  
      state1 = {
           'name': 'state1',
           'message': 'Sure, what kind of advice do you need?',
           'replies': {'Career advice': 'state3','Health advice': 'state4'}
      }
  
      state2 = {
           'name': 'state2',
           'message': "Yes, I'll do my best! What do you want to know?",
           'replies': {'Where can I find good tutorials': 'state5', 'Why is coding so hard': 'state6'}
      }
  
      state3 = {
           'name': 'state3',
           'message': 'It is always a good idea to research the field you are interested in and creating a plan to learn the skills that are required. Make sure to contact professionals in the field to understand their experience.',
           'replies': {}
      }
  
      state4 = {
           'name': 'state4',
           'message': 'Focus on eating healthy and staying active. Make sure to consult a medical professional if you have any concerns.',
           'replies': {}
      }
  
      state5 = {
           'name': 'state5',
           'message': 'You can find tutorials online or join coding communities to get help from experienced coders. StackOverflow and Cod Academy are great resources.',
           'replies': {}
      }
  
      state6 = {
           'name': 'state6',
           'message': 'Coding can be challenging, especially at first. Just remember that with practice, patience and problem solving skills you can overcome the obstacles.',
           'replies': {}
      }
  
      # Initialize the state
      current_state = state0
  
      # Keep a record of conversation
      conversation = []
  
      while True:
       # Print the current state message
       print(current_state['message'])
       conversation.append(current_state['message'])
  
       # Get the user input
       user_input = input('>> ')
       conversation.append(user_input)
  
       # Update the state
       if user_input in current_state['replies']:
        current_state = eval(current_state['replies'][user_input])
       else:
        print("I don't understand what you mean. Please try again.")
  
       # End the conversation when the state is terminal
       if not bool(current_state['replies']):
        print('Goodbye!')
        break
  
      print("=========================")
      print("Conversation:")
      for message in conversation:
       print(message)