


'''simple docstring'''






def A_       (					__SCREAMING_SNAKE_CASE			:       Tuple							)  ->	bool:
					if not all(x.isalpha() for x in string							):
										raise ValueError('''String must only contain alphabetic characters.'''							)

					__SCREAMING_SNAKE_CASE       :				Tuple       =			sorted(string.lower()							)
					return len(lowerCAmelCase_							) == len(set(lowerCAmelCase_							)							)


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

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







'''simple docstring'''

def 	__lowerCamelCase	( lowerCAmelCase_    )     -> bool:
		if not all(x.isalpha() for x in string    ):
				raise ValueError('String must only contain alphabetic characters.'    )

		_a	: Tuple								=				sorted(string.lower()    )
		return len(lowerCAmelCase_    ) == len(set(lowerCAmelCase_    )    )


if __name__ == "__main__":
							__lowerCAmelCase		     =  input('''Enter a string ''').strip()

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




