input: from typing import Dict, List, Union
  
  def chatbot_using_statediagram(states: Dict[str, Dict[str, Union[str, Dict[str, str]]]]) -> None:
      """
      Create a simple chatbot using Python and state diagrams. The chatbot initializes with a given state, 
      displays a message to the user, collects user input, and transitions to the next state based on the user's response.
      If the user input does not match any of the expected replies, the chatbot will prompt the user to try again.
      The chatbot will end the conversation when it reaches a terminal state.
      
      >>> chatbot_using_statediagram({
      ...     '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': {}
      ...     }
      ... })
      """
output:     current_state = 'state0'
      while True:
          state_info = states[current_state]
          print(state_info['message'])
          replies = state_info['replies']
          if not replies:
              break
          user_input = input("Your response: ")
          if user_input in replies:
              current_state = replies[user_input]
          else:
              print("Sorry, I didn't understand that. Please try again.")