check invalid params
tests
3
4
3
2
7
2001:db8:0:85a3::ac1f:8001	0	('::','ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff')
2001:db8:0:85a3:ffff:ffff:ffff:ffff	32	('2001:db8::','2001:db8:ffff:ffff:ffff:ffff:ffff:ffff')
ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff	16	('ffff::','ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff')
2001:df8:0:85a3::ac1f:8001	32	('2001:df8::','2001:df8:ffff:ffff:ffff:ffff:ffff:ffff')
2001:db8:85a3:85a3::ac1f:8001	16	('2001::','2001:ffff:ffff:ffff:ffff:ffff:ffff:ffff')
::	8	('::','ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff')
ffff::	4	('f000::','ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff')
('::','ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff')
('2001:db8:0:85a3::ac1f:8001','2001:db8:0:85a3::ac1f:8001')
('ffff:ffff:ffff:ffff::','ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff')
('::','ff:ffff:ffff:ffff:ffff:ffff:ffff:ffff')
('f000::','ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff')
1
('2001:db8:0:85a3::ac1f:8001','2001:db8:0:85a3::ac1f:8001')
('2001:db8:0:85a3::ac1f:8000','2001:db8:0:85a3::ac1f:8001')