# basic manipulation of IPv4 networks
pass add 10 10.11 10.11.12 10.11.12.13
pass delete 10.11.0.0/16 10.11.12.0/24
pass replace 10.0/8 172.16.0/12 192.168.0/16
pass test 10.1.1.1 172.17.1.1 192.168.1.1
fail test 11.1.1.1
fail test 10.1.1.1 11.1.1.1