Here's the instructions for the challenge.

Your challenge, should you choose to accept it, is to write a Ruby program that meets the following requirements:

The program accepts as arguments a list of one or more file paths (e.g. ./solution.rb file1.txt file2.txt ...). The program also accepts input on stdin (e.g. cat file1.txt | ./solution.rb). The program outputs a list of the 100 most common three word sequences in the text, along with a count of how many times each occurred in the text. For example: 231 - i will not 116 - i do not 105 - there is no 54 - i know not 37 - i am not ... The program ignores punctuation, line endings, and is case insensitive (e.g. "I love\nsandwiches." should be treated the same as "(I LOVE SANDWICHES!!)") The program is capable of processing large files and runs as fast as possible. You should push to GitHub at least three times.