
'''simple docstring'''

def 	A  (   UpperCamelCase_       :  Optional[Any]    ,						UpperCamelCase_       :  Optional[int]   )       ->							int:







			'''simple docstring'''



			lowerCAmelCase__										=				0
			while b > 0:
						if b & 1:
									res += a

						a += a
						b >>= 1

			return res







def 	A  (   UpperCamelCase_       :  List[str]    ,						UpperCamelCase_       :  Dict    ,						UpperCamelCase_       :  int   )       ->							Tuple:







			'''simple docstring'''



			lowerCAmelCase__										=				0
			while b > 0:
						if b & 1:
									lowerCAmelCase__										=				((res % c) + (a % c)) % c

						a += a
						b >>= 1

			return res











def SCREAMING_SNAKE_CASE							(			lowercase_		)  ->			list:



       """simple docstring"""

       if len(lowercase_		) <= 1:
              return [tuple(lowercase_		)]

       A__ 					=       []

       def generate(lowercase_					,							lowercase_		):
              if k == 1:
                     res.append(tuple(arr[:]		)		)
                     return

              generate(k - 1					,							lowercase_		)

              for i in range(k - 1		):
                     if k % 2 == 0:  # k is even
                            A__					,				A__ 					=       arr[k - 1], arr[i]
                     else:  # k is odd
                            A__					,				A__ 					=       arr[k - 1], arr[0]
                     generate(k - 1					,							lowercase_		)

       generate(len(lowercase_		)					,							lowercase_		)
       return res


if __name__ == "__main__":
  _lowerCamelCase      :						int							=  input("""Enter numbers separated by a comma:\n""").strip()
  _lowerCamelCase      :						str							=  [int(item) for item in user_input.split(""",""")]
  print(heaps(arr))


