





'''simple docstring'''



from __future__ import annotations

_SCREAMING_SNAKE_CASE       =     {
    '''A''': ['''B''', '''C''', '''E'''],
    '''B''': ['''A''', '''D''', '''E'''],
    '''C''': ['''A''', '''F''', '''G'''],
    '''D''': ['''B'''],
    '''E''': ['''A''', '''B''', '''D'''],
    '''F''': ['''C'''],
    '''G''': ['''C'''],
}






class 				__lowercase							:







	'''simple docstring'''

	def __init__(self  ,_lowerCamelCase  ,_lowerCamelCase			)				->				None:







				'''simple docstring'''





				__lowercase					    =				graph
				# mapping node to its parent in resulting breadth first tree
				__lowercase					    =				{}
				__lowercase					    =				source_vertex


	def     _UpperCAmelCase  (self			)				->				None:







				'''simple docstring'''





				__lowercase					    =				{self.source_vertex}
				__lowercase					    =				None
				__lowercase					    =				[self.source_vertex]  # first in first out queue

				while queue:
							__lowercase					    =				queue.pop(0			)
							for adjacent_vertex in self.graph[vertex]:
										if adjacent_vertex not in visited:
													visited.add(lowerCamelCase__			)
													__lowercase					    =				vertex
													queue.append(lowerCamelCase__			)


	def     _UpperCAmelCase  (self  ,_lowerCamelCase			)				->				str:







				'''simple docstring'''





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

				__lowercase					    =				self.parent.get(lowerCamelCase__			)
				if target_vertex_parent is None:
							__lowercase					    =				(
							    f"No path from vertex: {self.source_vertex} to vertex: {target_vertex}"
							)
							raise ValueError(lowerCamelCase__			)

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


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








def 							_lowerCamelCase   (			SCREAMING_SNAKE_CASE		,				SCREAMING_SNAKE_CASE   ):
      '''simple docstring'''







      A_							       =		len(SCREAMING_SNAKE_CASE   )
      A_							       =		len(SCREAMING_SNAKE_CASE   )
      A_							       =		(
          first_str_length if first_str_length > second_str_length else second_str_length
      )
      A_							       =		[]
      for char_count in range(SCREAMING_SNAKE_CASE   ):
            if char_count < first_str_length:
                  output_list.append(first_str[char_count]   )
            if char_count < second_str_length:
                  output_list.append(second_str[char_count]   )
      return "".join(SCREAMING_SNAKE_CASE   )


if __name__ == "__main__":
      print(alternative_string_arrange("""AB""", """XYZ"""), end=""" """)





