

"""simple docstring"""






import math



def   lowercase_	(    _lowercase       :		int	):




					'''simple docstring'''






					UpperCAmelCase			:   Optional[int]      =				[]
					UpperCAmelCase			:   str      =				2
					UpperCAmelCase			:   int      =				int(math.sqrt(_lowercase	)	)  # Size of every segment
					UpperCAmelCase			:   Optional[Any]      =				[True] * (end + 1)
					UpperCAmelCase			:   List[Any]      =				[]

					while start <= end:
										if temp[start] is True:
															in_prime.append(_lowercase	)
															for i in range(start * start							,      end + 1							,      _lowercase	):
																				UpperCAmelCase			:   Union[str, Any]      =				False
										start += 1
					prime += in_prime

					UpperCAmelCase			:   str      =				end + 1
					UpperCAmelCase			:   int      =				min(2 * end							,      _lowercase	)

					while low <= n:
										UpperCAmelCase			:   int      =				[True] * (high - low + 1)
										for each in in_prime:
															UpperCAmelCase			:   Optional[Any]      =				math.floor(low / each	) * each
															if t < low:
																				t += each

															for j in range(_lowercase							,      high + 1							,      _lowercase	):
																				UpperCAmelCase			:   Optional[Any]      =				False

										for j in range(len(_lowercase	)	):
															if temp[j] is True:
																				prime.append(j + low	)

										UpperCAmelCase			:   str      =				high + 1
										UpperCAmelCase			:   int      =				min(high + end							,      _lowercase	)

					return prime




print(sieve(1_0**6))





"""simple docstring"""






def   lowercase_	(    _lowercase       :		str	):




					'''simple docstring'''






					if not all(x.isalpha() for x in string	):
										raise ValueError("String must only contain alphabetic characters."	)

					UpperCAmelCase			:   Optional[int]      =				sorted(string.lower()	)
					return len(_lowercase	) == len(set(_lowercase	)	)


if __name__ == "__main__":
	snake_case_   :   Tuple        =       input("""Enter a string """).strip()

	snake_case_   :   str        =       is_isogram(input_str)
	print(f'''{input_str} is {"an" if isogram else "not an"} isogram.''')


