code: 
  
  
  
  """simple docstring"""
  from scipy.constants import g
  
  
  
  
  
  def 				lowerCamelCase_		(UpperCamelCase__	:	float  , UpperCamelCase__	:	float							):
      if mass < 0:
          # handling of negative values of mass
          raise ValueError('''The mass of a body cannot be negative'''							)
      if height < 0:
          # handling of negative values of height
          raise ValueError('''The height above the ground cannot be negative'''							)
      return mass * g * height
  
  
  if __name__ == "__main__":
    from doctest import testmod
  
    testmod(name='potential_energy')
  
  
  
style_context: 
  
  
  
  """simple docstring"""
  def 				lowerCamelCase_		(UpperCamelCase__	:	List[Any]  , UpperCamelCase__	:	int							):
      sequence.append(UpperCamelCase__							)
  
      _UpperCAmelCase							:						str       							=					0
      while sequence[index] != target:
          index += 1
  
      sequence.pop()
  
      if index == len(UpperCamelCase__							):
          return None
  
      return index
  
  
  if __name__ == "__main__":
    _lowerCAmelCase					:Dict  =      input('Enter numbers separated by comma:\n').strip()
    _lowerCAmelCase					:List[Any]  =      [int(item) for item in user_input.split(',')]
  
    _lowerCAmelCase					:int  =      input('Enter a single number to be found in the list:\n')
    _lowerCAmelCase					:List[Any]  =      int(target_input)
    _lowerCAmelCase					:Optional[int]  =      sentinel_linear_search(sequence, target)
    if result is not None:
      print(f"{target} found at positions: {result}")
    else:
      print('Not found')
  
  
  