
def  lowerCAmelCase__			(  SCREAMING_SNAKE_CASE_       ,							SCREAMING_SNAKE_CASE_     )				->		str:

			if not (isinstance(SCREAMING_SNAKE_CASE_       ,							SCREAMING_SNAKE_CASE_     ) and isinstance(SCREAMING_SNAKE_CASE_       ,							SCREAMING_SNAKE_CASE_     )):
						raise ValueError('longest_common_substring() takes two strings for inputs'     )

			lowerCAmelCase__      :      Dict         =		len(SCREAMING_SNAKE_CASE_     )
			lowerCAmelCase__      :      Tuple         =		len(SCREAMING_SNAKE_CASE_     )

			lowerCAmelCase__      :      Optional[Any]         =		[[0] * (texta_length + 1) for _ in range(texta_length + 1     )]
			lowerCAmelCase__      :      List[str]         =		0
			lowerCAmelCase__      :      List[Any]         =		0

			for i in range(1       ,							texta_length + 1     ):
						for j in range(1       ,							texta_length + 1     ):
									if texta[i - 1] == texta[j - 1]:
												lowerCAmelCase__      :      str         =		1 + dp[i - 1][j - 1]
												if dp[i][j] > ans_length:
															lowerCAmelCase__      :      Dict         =		i
															lowerCAmelCase__      :      Optional[Any]         =		dp[i][j]

			return texta[ans_index - ans_length : ans_index]


if __name__ == "__main__":
					import doctest

					doctest.testmod()

import os
from distutils.util import strtobool
def  lowerCAmelCase__			(  SCREAMING_SNAKE_CASE_       ,							SCREAMING_SNAKE_CASE_     )				->		Optional[Any]:
			for e in env_keys:
						lowerCAmelCase__      :      Union[str, Any]         =		int(os.environ.get(SCREAMING_SNAKE_CASE_       ,							-1     )     )
						if val >= 0:
									return val
			return default
def  lowerCAmelCase__			(  SCREAMING_SNAKE_CASE_       ,							SCREAMING_SNAKE_CASE_=False     )				->		List[str]:
			lowerCAmelCase__      :      Optional[int]         =		os.environ.get(SCREAMING_SNAKE_CASE_       ,							str(SCREAMING_SNAKE_CASE_     )     )
			return strtobool(SCREAMING_SNAKE_CASE_     ) == 1  # As its name indicates `strtobool` actually returns an int...







def  lowerCAmelCase__			(  SCREAMING_SNAKE_CASE_       ,							SCREAMING_SNAKE_CASE_="no"     )				->		List[str]:
			lowerCAmelCase__      :      Optional[int]         =		os.environ.get(SCREAMING_SNAKE_CASE_       ,							str(SCREAMING_SNAKE_CASE_     )     )
			return value