
from __future__ import annotations







def 						_snake_case(  SCREAMING_SNAKE_CASE__    )			->   bool:
       return len(set(SCREAMING_SNAKE_CASE__    )    ) == len(SCREAMING_SNAKE_CASE__    )


if __name__ == "__main__":
  import doctest

  doctest.testmod()


def 						_snake_case(  SCREAMING_SNAKE_CASE__    )			->   int:
       assert (
           isinstance(SCREAMING_SNAKE_CASE__ ,     SCREAMING_SNAKE_CASE__    ) and number_of_steps > 0
       ), f"number_of_steps needs to be positive integer, your input {number_of_steps}"
       if number_of_steps == 1:
              return 1
       lowercase     ,      lowercase							:					Tuple	     =				1, 1
       for _ in range(number_of_steps - 1    ):
              lowercase     ,      lowercase							:					str	     =				current + previous, current
       return current


if __name__ == "__main__":
  import doctest

  doctest.testmod()
