cool idea. but..

1) https://en.wikipedia.org/wiki/Cat_(Unix)#Useless_use_of_cat

2) speaking of #1, wheres < > &| etc?

3) Question #2:

    Extract only Ken Thompson and Dennis Ritchie's last names. Hint: look at Thompson and Ritchie's names in the list. What's special about the position of these lines in the file? Can you find a command that lets you get just those lines?

   um:

     egrep '(Thompson|Ritchie)' file


    there is more than one way to skin a cat, and some of these don't require static/fixed field numbers. and even then: `sed -ne 3,4p`. wheres that?