/0 = 0.0.0.0 = 256 a's /1 = 128.0.0.0 = 128 a's /2 = 192.0.0.0 = 64 a's /3 = 224.0.0.0 = 32 a's /4 = 240.0.0.0 = 16 a's /5 = 248.0.0.0 = 8 a's /6 = 252.0.0.0 = 4 a's /7 = 254.0.0.0 = 2 a's /8 = 255.0.0.0 = 1 a /9 = 255.128.0.0 = 128 b's /10 = 255.192.0.0 = 64 b's /11 = 255.224.0.0 = 32 b's /12 = 255.240.0.0 = 16 b's /13 = 255.248.0.0 = 8 b's /14 = 255.252.0.0 = 4 b's /15 = 255.254.0.0 = 2 b's /16 = 255.255.0.0 = 1 b /17 = 255.255.128.0 = 128 c's /18 = 255.255.192.0 = 64 c's /19 = 255.255.224.0 = 32 c's /20 = 255.255.240.0 = 16 c's /21 = 255.255.248.0 = 8 c's /22 = 255.255.252.0 = 4 c's /23 = 255.255.254.0 = 2 c's /24 = 255.255.255.0 = 1 c /25 = 255.255.255.128 = 128 /26 = 255.255.255.192 = 64 /27 = 255.255.255.224 = 32 /28 = 255.255.255.240 = 16 /29 = 255.255.255.248 = 8 /30 = 255.255.255.252 = 4 /31 = 255.255.255.254 = 2 /32 = 255.255.255.255 = 1