


__UpperCamelCase    		=       [0, 2, 4, 6, 8]
__UpperCamelCase    		=       [1, 3, 5, 7, 9]
def        UpperCamelCase_(				_A   :Any				,     _A   :int				,     _A   :List[str]				,     _A   :Optional[int]  )->		int:





			if remaining_length == 0:
						if digits[0] == 0 or digits[-1] == 0:
									return 0

						for i in range(length // 2 - 1				,     -1				,     -1  ):
									remainder += digits[i] + digits[length - i - 1]

									if remainder % 2 == 0:
												return 0

									remainder //= 10

						return 1

			if remaining_length == 1:
						if remainder % 2 == 0:
									return 0

						UpperCamelCase__					=       0
						for digit in range(10  ):
									UpperCamelCase__					=       digit
									result += reversible_numbers(
									    0				,     (remainder + 2 * digit) // 10				,     UpperCamelCase__				,     UpperCamelCase__  )
						return result

			UpperCamelCase__					=       0
			for digita in range(10  ):
						UpperCamelCase__					=       digita

						if (remainder + digita) % 2 == 0:
									UpperCamelCase__					=       ODD_DIGITS
						else:
									UpperCamelCase__					=       EVEN_DIGITS

						for digita in other_parity_digits:
									UpperCamelCase__					=       digita
									result += reversible_numbers(
									    remaining_length - 2				,     (remainder + digita + digita) // 10				,     UpperCamelCase__				,     UpperCamelCase__				,     )
			return result
def        UpperCamelCase_(				_A   :Tuple = 9  )->		int:
			UpperCamelCase__					=       0
			for length in range(1				,     max_power + 1  ):
						result += reversible_numbers(UpperCamelCase__				,     0				,     [0] * length				,     UpperCamelCase__  )
			return result


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






import os
import tempfile
import unittest

from transformers.models.marian.convert_marian_tatoeba_to_pytorch import DEFAULT_REPO, TatoebaConverter
from transformers.testing_utils import slow
from transformers.utils import cached_property







@unittest.skipUnless(os.path.exists(UpperCAmelCase      )					,	'Tatoeba directory does not exist.'      )
class        lowerCamelCase__	(							unittest.TestCase      ):






			"""simple docstring"""






			@cached_property
			def 				snake_case__				(							self     ):

						'''simple docstring'''


						UpperCamelCase__					=       tempfile.mkdtemp()
						return TatoebaConverter(save_dir=snake_case     )




			@slow
			def 				snake_case__				(							self     ):

						'''simple docstring'''


						self.resolver.convert_models(["heb-eng"]     )







			@slow
			def 				snake_case__				(							self     ):

						'''simple docstring'''


						UpperCamelCase__,      UpperCamelCase__					=       self.resolver.write_model_card("opus-mt-he-en"      ,						dry_run=snake_case     )
						assert mmeta["long_pair"] == "heb-eng"


