A.2046 B.2048 C.4094 D.4096
A.255.255.255.0 B.255.255.254.0 C.255.255.252.0 D.255.255.248.0
A.202.16.7.255 B.202.16.7.159 C.202.16.7.191 D.202.16.7.252