
from __future__ import annotations

lowercase    :   Union[str, Any]		       =				{
    'A': ['B', 'C', 'E'],
    'B': ['A', 'D', 'E'],
    'C': ['A', 'F', 'G'],
    'D': ['B'],
    'E': ['A', 'B', 'D'],
    'F': ['C'],
    'G': ['C'],
}

class __snake_case						:
    def __init__(    self						,snake_case						,snake_case ):



           '''simple docstring'''







           lowercase				:	Tuple			      = graph
           # mapping node to its parent in resulting breadth first tree
           lowercase				:	Any			      = {}
           lowercase				:	List[str]			      = source_vertex
    def  _SCREAMING_SNAKE_CASE			(    self ):



           '''simple docstring'''







           lowercase				:	Union[str, Any]			      = {self.source_vertex}
           lowercase				:	Any			      = None
           lowercase				:	Optional[Any]			      = [self.source_vertex]  # first in first out queue

           while queue:
                  lowercase				:	Optional[int]			      = queue.pop(0 )
                  for adjacent_vertex in self.graph[vertex]:
                         if adjacent_vertex not in visited:
                                visited.add(lowercase_ )
                                lowercase				:	List[Any]			      = vertex
                                queue.append(lowercase_ )
    def  _SCREAMING_SNAKE_CASE			(    self						,snake_case ):



           '''simple docstring'''







           if target_vertex == self.source_vertex:
                  return self.source_vertex

           lowercase				:	int			      = self.parent.get(lowercase_ )
           if target_vertex_parent is None:
                  lowercase				:	Optional[int]			      = (
                      f"No path from vertex: {self.source_vertex} to vertex: {target_vertex}"
                  )
                  raise ValueError(lowercase_ )

           return self.shortest_path(lowercase_ ) + f"->{target_vertex}"


if __name__ == "__main__":
  lowercase    :   Tuple		       =				Graph(graph, """G""")
  g.breath_first_search()
  print(g.shortest_path("""D"""))
  print(g.shortest_path("""G"""))
  print(g.shortest_path("""Foo"""))




_lowerCAmelCase:						List[str]   				=       'ABCDEFGHIJKLMNOPQRSTUVWXYZ'






def   _lowercase(					):
							a__      =input('Enter message: '     )
							a__      =input('Enter key [alphanumeric]: '     )
							a__      =input('Encrypt/Decrypt [e/d]: '     )

							if mode.lower().startswith('e'     ):
														a__      ='encrypt'
														a__      =encrypt_message(__a    ,     __a     )
							elif mode.lower().startswith('d'     ):
														a__      ='decrypt'
														a__      =decrypt_message(__a    ,     __a     )

							print(f"""\n{mode.title()}ed message:"""     )
							print(__a     )






def   _lowercase(					__a				:						str    ,     __a				:						str     ):
							return translate_message(__a    ,     __a    ,     'encrypt'     )






def   _lowercase(					__a				:						str    ,     __a				:						str     ):
							return translate_message(__a    ,     __a    ,     'decrypt'     )






def   _lowercase(					__a				:						str    ,     __a				:						str    ,     __a				:						str     ):
							a__      =[]
							a__      =0
							a__      =key.upper()

							for symbol in message:
														a__      =LETTERS.find(symbol.upper()     )
														if num != -1:
																					if mode == "encrypt":
																												num += LETTERS.find(key[key_index]     )
																					elif mode == "decrypt":
																												num -= LETTERS.find(key[key_index]     )

																					num %= len(__a     )

																					if symbol.isupper():
																												translated.append(LETTERS[num]     )
																					elif symbol.islower():
																												translated.append(LETTERS[num].lower()     )

																					key_index += 1
																					if key_index == len(__a     ):
																												a__      =0
														else:
																					translated.append(__a     )
							return "".join(__a     )


if __name__ == "__main__":
	main()

