




def 							_UpperCAmelCase  (UpperCamelCase_ : int      ,    UpperCamelCase_ : float      ,    UpperCamelCase_ : float       ):
				return round(float(moles / volume       ) * nfactor       )




def 							_UpperCAmelCase  (UpperCamelCase_ : float      ,    UpperCamelCase_ : float      ,    UpperCamelCase_ : float       ):
				return round(float((moles * 0.0_821 * temperature) / (volume)       )       )




def 							_UpperCAmelCase  (UpperCamelCase_ : float      ,    UpperCamelCase_ : float      ,    UpperCamelCase_ : float       ):
				return round(float((moles * 0.0_821 * temperature) / (pressure)       )       )




def 							_UpperCAmelCase  (UpperCamelCase_ : float      ,    UpperCamelCase_ : float      ,    UpperCamelCase_ : float       ):
				return round(float((pressure * volume) / (0.0_821 * moles)       )       )


if __name__ == "__main__":
	import doctest

	doctest.testmod()







def 							_UpperCAmelCase  (UpperCamelCase_ : str       ):
				'''simple docstring'''
				_lowerCAmelCase    :    List[str]										=      [int(UpperCamelCase_       ) for i in ip_va_address.split("""."""       ) if i.isdigit()]
				return len(UpperCamelCase_       ) == 4 and all(0 <= int(UpperCamelCase_       ) <= 254 for octet in octets       )


if __name__ == "__main__":
	_lowerCamelCase      :  List[str]      						=						input().strip()
	_lowerCamelCase      :  int      						=						"valid" if is_ip_va_address_valid(ip) else "invalid"
	print(F'''{ip} is a {valid_or_invalid} IP v4 address.''')

