use strict;
use warnings;

my @lines = ("ip:192.168.243.1", "ip:192.168.243.2" =~ /(ip:([0-9]{3}|[0-9]{2}|[0-9]{1})\.([0-9]{3}|[0-9]{2}|[0-9]{1})\.([0-9]{3}|[0-9]{2}|[0-9]{1})\.([0-9]{3}|[0-9]{2}|[0-9]{1}))/);

print "@lines\n";