



'''simple docstring'''





def lowerCAmelCase    (__A):



     """simple docstring"""



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

     _a           =    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.""")











def     a     (		lowerCamelCase_							):






				'''simple docstring'''

				if p < 2:
								raise ValueError('''p should not be less than 2!'''							)
				elif p == 2:
								return True

				lowercase__  					=     4
				lowercase__  					=     (1 << p) - 1
				for _ in range(p - 2							):
								lowercase__  					=     ((s * s) - 2) % m
				return s == 0


if __name__ == "__main__":
							print(lucas_lehmer_test(7))
							print(lucas_lehmer_test(11))




