Haskell Quiz/Phone Number Words

1-800-THE-QUIZ (#20)

Many companies like to list their phone numbers using the letters printed on most telephones. This makes the number easier to remember for customers. A famous example being 1-800-PICK-UPS.

This week's quiz is to write a program that will show a user possible matches for a list of provided phone numbers.

The problem

• http://www.rubyquiz.com/quiz20.html