


"""simple docstring"""







def _A		(		lowercase			,       lowercase						):







    """simple docstring"""
    sequence.append(_A						)

    a											=0
    while sequence[index] != target:
        index += 1

    sequence.pop()

    if index == len(_A						):
        return None

    return index


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

       lowerCamelCase_  :  int     		=    input("""Enter a single number to be found in the list:\n""")
       lowerCamelCase_  :  Any     		=    int(target_input)
       lowerCamelCase_  :  List[Any]     		=    sentinel_linear_search(sequence, target)
       if result is not None:
              print(F'{target} found at positions: {result}')
       else:
              print("""Not found""")


def      UpperCAmelCase__							(     _A :					Optional[int]      , _A :					Optional[int]				):





  '''simple docstring'''







  sequence.append(_A				)

  a__    =0
  while sequence[index] != target:
    index += 1

  sequence.pop()

  if index == len(_A				):
    return None

  return index


if __name__ == "__main__":
       lowerCamelCase 	=   input('''Enter numbers separated by comma:\n''').strip()
       lowerCamelCase 	=   [int(item) for item in user_input.split(''',''')]

       lowerCamelCase 	=   input('''Enter a single number to be found in the list:\n''')
       lowerCamelCase 	=   int(target_input)
       lowerCamelCase 	=   sentinel_linear_search(sequence, target)
       if result is not None:
              print(f"""{target} found at positions: {result}""")
       else:
              print('''Not found''')
