IPv4 listening ports accepts wrong answer, does not accept correct answer

[0ki]

Summary

Challenge expects to only show tcp ports, excluding udp. This is not stated anywhere.

Steps to reproduce

https://cmdchallenge.com/#/IPv4_listening_ports

Sample of correct solution: cat netstat.out |awk '{print $1,$4}'|grep ^..p\ |cut -d : -f 2|sort -nru