$7.$ First, try the commands below to see how it works. Show the content of the file output.txt$.$

echo $-$e "begin$/$ncountrycode$">$ list.txt

awk $\text{'}\{$print $$5\}\text{'}$ lab$4\_24022007.$txt $|$ grep $-$v Proto $|$ awk $-$F: $\text{'}\{$print $$1\}\text{'}|$ grep $^8[1-3]|$ sort $-$u $>>$ list.txt

echo $-$e "end" $>>$ list.txt

netcat whois.cymru.com $43<$ list.txt $>$ output.txt