input: def chatbot_state_machine() -> str:
      """ This function implements a simple chatbot using Python and state diagrams.
      It defines a set of states where each state has a message to be displayed and 
      possible replies leading to other states. The chatbot interacts with the user 
      through these states, updating the current state based on user input until it
      reaches a terminal state. The conversation is recorded and printed at the end.
      
      Example:
      >>> chatbot_state_machine()
      How can I help you?
      >> I need some advice
      Sure, what kind of advice do you need?
      >> Health advice
      Focus on eating healthy and staying active. Make sure to consult a medical professional if you have any concerns.
      Goodbye!
      =========================
      Conversation:
      Hello! How can I help you?
      I need some advice
      Sure, what kind of advice do you need?
      Health advice
      Focus on eating healthy and staying active. Make sure to consult a medical professional if you have any concerns.
      """
  
      # 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)
  
      return "All interactions completed."
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)
  
      return "All interactions completed."