code: from __future__ import annotations
  def 				__lowercase	(						lowerCamelCase__					)				->list[int]:
  
    '''simple docstring'''
  
  
  
  
    assert (
        isinstance(lowerCamelCase__ ,				lowerCamelCase__					) and mask > 0
    ), f"mask needs to be positive integer, your input {mask}"
    a__     		=     []
    a__     		=     mask
  
    while submask:
      all_submasks.append(lowerCamelCase__					)
      a__     		=     (submask - 1) & mask
  
    return all_submasks
  
  
  if __name__ == "__main__":
       import doctest
  
       doctest.testmod()
  
  
style_context: def 				__lowercase	(						lowerCamelCase__ ,				lowerCamelCase__					)				->Optional[int]:
  
    '''simple docstring'''
  
  
  
  
    sequence.append(lowerCamelCase__					)
  
    a__     		=     0
    while sequence[index] != target:
      index += 1
  
    sequence.pop()
  
    if index == len(lowerCamelCase__					):
      return None
  
    return index
  
  
  if __name__ == "__main__":
       _SCREAMING_SNAKE_CASE   						=    input("""Enter numbers separated by comma:\n""").strip()
       _SCREAMING_SNAKE_CASE   						=    [int(item) for item in user_input.split(""",""")]
  
       _SCREAMING_SNAKE_CASE   						=    input("""Enter a single number to be found in the list:\n""")
       _SCREAMING_SNAKE_CASE   						=    int(target_input)
       _SCREAMING_SNAKE_CASE   						=    sentinel_linear_search(sequence, target)
       if result is not None:
            print(F"""{target} found at positions: {result}""")
       else:
            print("""Not found""")
  
  