code: 
  
  
  
  
  
  from __future__ import annotations
  
  def     a						(      _lowercase   :     list[int] ,						_lowercase   :     int       )     ->List[Any]:
  		UpperCamelCase__         =	{}
  		for index, val in enumerate(_A       ):
  				UpperCamelCase__         =	target - val
  				if compl in chk_map:
  						return [chk_map[compl], index]
  				UpperCamelCase__         =	index
  		return []
  
  
  if __name__ == "__main__":
  				import doctest
  
  				doctest.testmod()
  				print(f"""{two_sum([2, 7, 11, 15], 9) = }""")
  
  
  
  
  
style_context: 
  
  
  
  
  
  def     a						(      _lowercase   :     List[str]       )     ->List[str]:
  		UpperCamelCase__         =	[7_0_1, 3_0_1, 1_3_2, 5_7, 2_3, 1_0, 4, 1]
  		for gap in gaps:
  				for i in range(_lowercase ,						len(_lowercase       )       ):
  						UpperCamelCase__         =	collection[i]
  						UpperCamelCase__         =	i
  						while j >= gap and collection[j - gap] > insert_value:
  								UpperCamelCase__         =	collection[j - gap]
  								j -= gap
  						if j != i:
  								UpperCamelCase__         =	insert_value
  		return collection
  
  
  if __name__ == "__main__":
  				from doctest import testmod
  
  				testmod()
  				__lowerCAmelCase     =			input("Enter numbers separated by a comma:\n").strip()
  				__lowerCAmelCase     =			[int(item) for item in user_input.split(",")]
  				print(shell_sort(unsorted))
  
  
  
  
  
  