Following on from Professor Brian Kernighan's video on grep, we asked him how his students fared in the challenge. Original GREP video: https://www.youtube.com/watch?v=NTfOnGZUZDk https://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com/