





'''simple docstring'''


import math

lowerCAmelCase_   :   int       =					10
lowerCAmelCase_   :   List[str]       =					7
lowerCAmelCase_   :   Optional[int]       =					BALLS_PER_COLOUR * NUM_COLOURS







def    _lowerCamelCase  (__lowerCamelCase  :     int = 20     )   ->    int:
			a__     = math.comb(_lowerCamelCase					,  _lowerCamelCase     )
			a__     = math.comb(NUM_BALLS - BALLS_PER_COLOUR					,  _lowerCamelCase     )

			a__     = NUM_COLOURS * (1 - missing_colour / total)

			return f'''{result:.9f}'''


if __name__ == "__main__":
		print(solution(20))












'''simple docstring'''


import re







def    _lowerCamelCase  (__lowerCamelCase  :     str     )   ->    bool:
			a__     = re.compile(
			    r"^(?:0|94|\+94|0{2}94)" r"7(0|1|2|4|5|6|7|8)" r"(-| |)" r"\d{7}$"     )

			return bool(re.search(__lowerCamelCase					,  __lowerCamelCase     )     )


if __name__ == "__main__":
		lowerCAmelCase_   :   Any       =					"0094702343221"

		print(is_sri_lankan_phone_number(phone))



