import re

def 							__SCREAMING_SNAKE_CASE							(				lowerCAmelCase:  str )   ->       str:

				if len(re.findall("[ATCG]"  ,      lowerCAmelCase ) ) != len(lowerCAmelCase ):
								raise ValueError("Invalid Strand" )

				return dna.translate(dna.maketrans("ATCG"  ,      "TAGC" ) )


if __name__ == "__main__":
					import doctest

					doctest.testmod()





def 							__SCREAMING_SNAKE_CASE							(				lowerCAmelCase:  str  ,      lowerCAmelCase:  str )   ->       int:
				if len(lowerCAmelCase ) != len(lowerCAmelCase ):
								raise ValueError("String lengths must match!" )

				_UpperCAmelCase       :		List[Any] 		=    0

				for chara, chara in zip(lowerCAmelCase  ,      lowerCAmelCase ):
								if chara != chara:
												count += 1

				return count


if __name__ == "__main__":
					import doctest

					doctest.testmod()


