





"""simple docstring"""






def      __A   (      a_    :int = 10**12)		->		int:
				__a			:    List[Any]      							=	1
				__a			:    List[str]      							=	0

				__a			:    int      							=	1
				__a			:    int      							=	1

				while numerator <= 2 * min_total - 1:
								prev_numerator += 2 * numerator
								numerator += 2 * prev_numerator

								prev_denominator += 2 * denominator
								denominator += 2 * prev_denominator

				return (denominator + 1) // 2


if __name__ == "__main__":
		print(F'{solution() = }')




def 		a__      (		_UpperCamelCase      :			str				):
   if not all(x.isalpha() for x in string				):
      raise ValueError('''String must only contain alphabetic characters.'''				)

   __lowerCamelCase    				=     sorted(string.lower()				)
   return len(_UpperCamelCase				) == len(set(_UpperCamelCase				)				)


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.")






