




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

    UpperCAmelCase_										=					sorted(string.lower()				)
    return len(__UpperCamelCase				) == len(set(__UpperCamelCase				)				)


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.")











def  SCREAMING_SNAKE_CASE     (	__UpperCamelCase      :						float	,					__UpperCamelCase      :						float				)  ->							float:

    if density <= 0:
        raise ValueError('''Impossible fluid density'''				)
    if bulk_modulus <= 0:
        raise ValueError('''Impossible bulk modulus'''				)

    return (bulk_modulus / density) ** 0.5


if __name__ == "__main__":
 import doctest

 doctest.testmod()





