Unix / Linux:

All of your searches for this assignment should be done in a case-insensitive fashion. You may use grep's -i option to effect this if you wish.

Use grep just once per problem! In other words, do not pipe the output of one grep command to another one; instead, make one regular expression work.

1. Use grep -E and wc to count how many words in /usr/share/dict/words contain four letters that are in consecutive alphabetical order. An example word is overstuffed because it contains rstu. Show both your command line and its output.