






from __future__ import annotations

from typing import Any


class    __lowercase   (						lowercase_	):







     '''simple docstring'''
     pass


class    __lowercase   :







     '''simple docstring'''




     def __init__(					self							:      Dict			,						UpperCamelCase_							:      Any					):


         """simple docstring"""



         __A       =						data
         __A       =						None




     def __iter__(					self							:      str					):


         """simple docstring"""



         __A       =						self
         __A       =						[]
         while node:
             if node in visited:
                 raise ContainsLoopError
             visited.append(UpperCamelCase_					)
             yield node.data
             __A       =						node.next_node





     @property
     def 		lowerCAmelCase_  (					self							:      List[str]					):


         """simple docstring"""



         try:
             list(self					)
             return False
         except ContainsLoopError:
             return True


if __name__ == "__main__":
  __a   :							str						= Node(1)
  __a   :							Tuple						= Node(2)
  __a   :							int						= Node(3)
  __a   :							str						= Node(4)
  print(root_node.has_loop)  # False
  __a   :							Optional[Any]						= root_node.next_node
  print(root_node.has_loop)  # True

  __a   :							Optional[Any]						= Node(5)
  __a   :							Any						= Node(6)
  __a   :							Dict						= Node(5)
  __a   :							Any						= Node(6)
  print(root_node.has_loop)  # False

  __a   :							List[Any]						= Node(1)
  print(root_node.has_loop)  # False












def       _SCREAMING_SNAKE_CASE    (			__lowercase :      str     )    ->   str:





    """simple docstring"""

    __A       =						""""""
    for ch in key:
        if ch == " " or ch not in key_no_dups and ch.isalpha():
            key_no_dups += ch
    return key_no_dups



def       _SCREAMING_SNAKE_CASE    (			__lowercase :      str     )    ->   dict[str, str]:





    """simple docstring"""

    __A       =						[chr(i + 6_5     ) for i in range(2_6     )]
    # Remove duplicate characters from key
    __A       =						remove_duplicates(key.upper()     )
    __A       =						len(__lowercase     )
    # First fill cipher with key characters
    __A       =						{alphabet[i]: char for i, char in enumerate(__lowercase     )}
    # Then map remaining characters in alphabet to
    # the alphabet from the beginning
    for i in range(len(__lowercase     )      ,					2_6     ):
        __A       =						alphabet[i - offset]
        # Ensure we are not mapping letters to letters previously mapped
        while char in key:
            offset -= 1
            __A       =						alphabet[i - offset]
        __A       =						char
    return cipher_alphabet



def       _SCREAMING_SNAKE_CASE    (			__lowercase :      str      ,					__lowercase :      dict[str, str]     )    ->   str:





    """simple docstring"""

    return "".join(cipher_map.get(__lowercase      ,					__lowercase     ) for ch in message.upper()     )



def       _SCREAMING_SNAKE_CASE    (			__lowercase :      str      ,					__lowercase :      dict[str, str]     )    ->   str:





    """simple docstring"""

    __A       =						{v: k for k, v in cipher_map.items()}
    return "".join(rev_cipher_map.get(__lowercase      ,					__lowercase     ) for ch in message.upper()     )



def       _SCREAMING_SNAKE_CASE    (			)    ->   None:





    """simple docstring"""

    __A       =						input("""Enter message to encode or decode: """     ).strip()
    __A       =						input("""Enter keyword: """     ).strip()
    __A       =						input("""Encipher or decipher? E/D:"""     ).strip()[0].lower()
    try:
        __A       =						{"""e""": encipher, """d""": decipher}[option]
    except KeyError:
        raise KeyError("""invalid input option"""     )
    __A       =						create_cipher_map(__lowercase     )
    print(func(__lowercase      ,					__lowercase     )     )


if __name__ == "__main__":
  import doctest

  doctest.testmod()
  main()




