def 							UpperCAmelCase__(					__UpperCAmelCase			:     str       ):





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

   __snake_case   :			Optional[Any]										=						sorted(string.lower()       )
   return len(SCREAMING_SNAKE_CASE_       ) == len(set(SCREAMING_SNAKE_CASE_       )       )


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

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










'''simple docstring'''


from __future__ import annotations


def 						__a(SCREAMING_SNAKE_CASE_	:       int | float | str		,							SCREAMING_SNAKE_CASE_	:       int | float | str     ):



    '''simple docstring'''





    if nth_term == "":
        return [""]
    _lowerCAmelCase						      =   int(SCREAMING_SNAKE_CASE_     )
    _lowerCAmelCase						      =   int(SCREAMING_SNAKE_CASE_     )
    _lowerCAmelCase						      =   []
    for temp in range(int(SCREAMING_SNAKE_CASE_     )     ):
        series.append(F'''1 / {pow(temp + 1		,							int(SCREAMING_SNAKE_CASE_     )     )}''' if series else "1"     )
    return series


if __name__ == "__main__":
       import doctest

       doctest.testmod()

       _SCREAMING_SNAKE_CASE									=				int(input("Enter the last number (nth term) of the P-Series"))
       _SCREAMING_SNAKE_CASE									=				int(input("Enter the power for  P-Series"))
       print("Formula of P-Series => 1+1/2^p+1/3^p ..... 1/n^p")
       print(p_series(nth_term, power))


