code: 
  
  
  def 							SCREAMING_SNAKE_CASE					(  _UpperCAmelCase							,     _UpperCAmelCase				)    ->  Optional[Any]:
  						sequence.append(_UpperCAmelCase				)
  
  						_a     =			0
  						while sequence[index] != target:
  												index += 1
  
  						sequence.pop()
  
  						if index == len(_UpperCAmelCase				):
  												return None
  
  						return index
  
  
  if __name__ == "__main__":
  		lowercase_								=    input('Enter numbers separated by comma:\n').strip()
  		lowercase_								=    [int(item) for item in user_input.split(',')]
  
  		lowercase_								=    input('Enter a single number to be found in the list:\n')
  		lowercase_								=    int(target_input)
  		lowercase_								=    sentinel_linear_search(sequence, target)
  		if result is not None:
  				print(f"""{target} found at positions: {result}""")
  		else:
  				print('Not found')
  
  
  
style_context: 
  
  
  import math
  
  
  def 							SCREAMING_SNAKE_CASE					(  _UpperCAmelCase				)    ->  float:
  						_a     =			math.log(2							,     10				) * number
  						_a     =			round((log_number - int(_UpperCAmelCase				))							,     15				)
  
  						return difference
  
  
  def 							SCREAMING_SNAKE_CASE					(  _UpperCAmelCase = 678910				)    ->  int:
  						_a     =			90
  						_a     =			0
  
  						_a     =			math.log(1.23							,     10				)
  						_a     =			math.log(1.24							,     10				)
  						_a     =			0
  
  						while position < number:
  												_a     =			log_difference(_UpperCAmelCase				)
  
  												if difference >= upper_limit:
  																		power_iterator += 93
  
  												elif difference < lower_limit:
  																		power_iterator += 196
  
  												else:
  																		_a     =			power_iterator
  																		power_iterator += 196
  																		position += 1
  
  						return previous_power
  
  
  if __name__ == "__main__":
  		import doctest
  
  		doctest.testmod()
  
  		print(f"""{solution() = }""")
  
  
  