


"""simple docstring"""







def      lowercase			(				A_       )->      int:
  '''simple docstring'''







  a						:		Any      							=			0
  while num > 0:
    digit_sum += num % 10
    num //= 10
  return digit_sum


def      lowercase			(				A_ = 100       )->      int:
  '''simple docstring'''







  a						:		Tuple      							=			1
  a						:		Optional[int]      							=			2

  for i in range(2  ,   max_n + 1       ):
    a						:		Optional[Any]      							=			pre_numerator
    a						:		Optional[int]      							=			2 * i // 3 if i % 3 == 0 else 1
    a						:		Dict      							=			cur_numerator
    a						:		List[str]      							=			e_cont * pre_numerator + temp

  return sum_digits(A_       )


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










"""simple docstring"""







def      lowercase			(				A_       )->      bool:
  '''simple docstring'''







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

  a						:		Tuple      							=			sorted(string.lower()       )
  return len(A_       ) == len(set(A_       )       )


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

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






